General purpose capacitor for AC applications, motor run. Switching
capacitor for industrial and motor speed controls, electronic ballasts
and SMPS
Dielectric
Polypropylene
Electrodes
Vacuum deposited metal layers
Coating
UL 510 / CSA TIL I-26 polyester tape wrapping; UL 94 V-0 resin end ll.
Flame retardant execution
Construction
Extended metallized lm (refer to General Technical Information)
Terminals
Tinned copper wire (lead-free)
Degree of protection
IP00
Installation
Whatever position assuring correct heat dissipation. Arrangement of
many components with surfaces in contact not admitted; suggested
minimum distance between side by side elements ≥1/12 of the
diameter size
Reference standard
IEC 60068, EN60252-1, IEC61071, RoHS compliant
Climatic category
40/85/56 (IEC 60068/1), GPD (DIN40040)
Please refer also to paragraph C10 (humid ambient) of the General
Technical Information
Operating temperature range (case)
40°...+85°C
Max. permissible ambient temperature
+70°C (operation at rated power, current, voltage and natural cooling)
Nominal Capacitance (Cn) µF
0,22µF to 60µF. Refer to article table
Capacitance tolerance (at 1kHz)
±10% (code=K), ±5% (code=J) and ±20% (code=M). Other tolerances
upon request
Capacitance temperature coecient
Refer to General Technical Information
Long term stability (at 1kHz)
Capacitance variation ≤ ±1% after a period of 2 years at standard
environmental conditions
Rated voltage (Ur) at +85°C (Vdc)
370, 500, 600, 700, 800Vdc. Please refer to article table
Rated AC voltage at 60Hz (Vac)
160 ÷ 500Vac. Please refer to the article table
Non recurrent surge voltage (Upk) Vdc
470, 625, 750, 875, 1050Vdc
Self inductance
≤1nH/mm of capacitor pitch and leads length used for connection
Maximum pulse rise time V/µs
Refer to article table
Maximum peak current (Ipeak) A
Refer to article table. Max. non repetitive Ipk = 1,5 x Ipeak
Dissipation factor (DF), max.
-4
tgδ x10
Insulation resistance (R
after 1 minute of electrication at 100Vdc (25 ± 5°C):
R
R
B-Technical Terms (reference standards: EN, IEC, CECC and DIN normative) and general technical data
B1-Nominal Capacitance (C
B2-Capacitance Tolerance
B3-Temperature Coefcient of Capacitance (α)
B4-Long Term Stability
B5-Rated Voltage (U
B6-Category Voltage (U
B7-Temperature De-rated Voltage
B8-Superimposed AC Voltage
B9-Permissible AC Voltage up to 60Hz
B10-Test Voltage between terminals (Ut)
B11-Test Voltage between terminals and case (Utc)
B12-Non Recurrent Surge Voltage (Upk) and Recurrent Peak Voltage (Upkr)
B13-Rated Ripple Current (Ir)
B14-Rated r.m.s. Current (Irms)
B15-Max. Repetitive Peak Current (Ipeak)
B16-Max. Non Repetitive Peak Current (Ipk)
B17-Category Temperature Range
B18-Lower Category Temperature (T
B19-Rated Temperature ( T
B20-Ambient Temperature (θamb or Tamb)
B21-Rated Pulse Load, Pulse Rise Time (du/dt) and Waveform Energy Content (K
B22-Equivalent Series Resistance (ESR)
B23-Dissipation Factor (tgδ or DF)
B24-Impedance (Z)
B25-Power Dissipation and Thermal Resistance (Rth)
B26-Self Inductance (L) and Resonant Frequency (f
B27-Insulation Resistance (R
B28-Test Categories (reference: IEC60068-1)
B29-Permitted Temperature and Humidity (reference: DIN40040)
B30-Solder conditions for capacitors on printed circuit boards; terminals RoHS compliance
B31-Dimensions, tolerances, terminals position and centering, lugs screws xing torque and connection modes
B32-Standard Environmental Conditions for Test
B33-Typical curves
B34-Reference Reliability and Failure Rate (λ)
B35-Life Expectancy (Le)
B36-EN60252-1 normative Life Expectancy Classes
B37-Taping specication for axial capacitors
B38-E series according to DIN41426 and IEC60063 (preferred capacitance values)
or Cn)
N
or Ur; Urms; UN; U
R
)
C
)
R
) and Time Constant (τ)
INS
)
NDC
) and Upper Category Temperature (TB )
A
)
r
)
O
C-Application notes, operation and safety conditions
C1-Voltage applied and ionization eects
C2-Pulse applications
C3-Noises produced by capacitors
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General technical information
C4-Permissible current
C5-Operating temperature (T
C6-Components tting on PCBs and arrangement in equipment layout
C7-Vibrations and mechanical shocks
C8-Connections
C9-Across the line and interference suppression applications (class X and Y caps.)
C10-Special working conditions:
- Humid ambient (high temperature and high humidity operation)
- Sealing resins
- Immersion in oils-liquids
- Adhesive curing
- Rapid mould growth, corrosive atmosphere and ambient with a high degree of pollution
- Operating altitude
- Other unusual service conditions
C11-Materials flame retardancy, RoHS, REACH, Conflicts Free Minerals normative and regulations compliance
C12-Safety warnings for capacitors usage in power equipment
D-Storage conditions and Standard environmental conditions
E-Printing and production date codes; resistance to solvents
)
OP
F-General Warning (general rules and indications for problems and failures management or rejections)
G-Updating and validity of product specications; general data and information
H-Application Data Questionnaire
I-Capacitors selection guide; application matrix
IMPORTANT:
information and data contained in the chapter “General technical information”, are a completing part of the
single series specications. The series specications are completed with the data given in the “General Technical
Information” chapter.
Data and characteristics shown in this catalogue are subjected to modications without notice.
Always refer to ICEL S.r.l. web site, www.icel.it for products updated characteristics, last revision specications,
general data and information, products certications and news.
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General technical information
A-Capacitor design and construction
Plastic lm capacitors can be subdivided into two main groups on the base of their construction: lm-foil capacitors and metallized lm capacitors.
The combination of these two technologies brings to a third group of capacitors, which gets the advantages of both the above groups.
A1- Film-foil capacitors
Typical lm-foil capacitor consists of two metal foil electrodes with a plastic lm between them, used as dielectric.
Metal foils thickness is typically 5 to 9μm and the plastic lm must be thick enough to guarantee the necessary capacitor reliability in terms of
voltage withstanding and long-term performances and reliability.
Film-foil capacitors, being not able to self-heal (refer to related paragraph A-3) usually need a dielectric thickness higher than the one of metallized
lm capacitors, having the same voltage ratings.
It means that, considering the same dielectric type, capacitance and voltage rating, the typical dimensions of the lm-foil capacitors are larger than
metallized lm capacitors ones.
The presence of metal foil electrodes ensures high insulation resistance, very good capacitance stability, low losses even at high frequency,
excellent pulse handling capability and high current withstanding.
Film-foil capacitors don’t have self-healing properties.
In metallized lm capacitors, the metal electrodes are vacuum deposited directly onto the dielectric lm surface.
The dierent metal alloys, their shape and the thickness of the metal layer influence in a relevant way the characteristics, behavior, performances,
energy density and typical usage destination of the capacitors.
The outstanding advantage of metallized lm capacitor technology is the self-healing property.
The extremely thin metal layer obtainable (typical thickness from 0.02 to 0.05μm for “flat” metallization) and the availability of low thickness
dielectric lms allow the production of capacitors with smaller dimensions than lm-foil ones, having the same voltage rating.
The contacting of metallized lm capacitors is made by spraying metal alloys onto the windings face ends and then welding the terminals on those
metal sprayed areas.
This ensures a low inductance and low loss characteristics.
Metallized lm capacitors do not typically guarantee high pulse withstanding capability.
Nevertheless, a medium-high pulse handling capability can be reached with metallized lm technology, using special lms having metallization
with reinforced contact edges and particular metal alloys, or adopting inner series connection design.
Special metallization design, like slope prole (variable R, metallization thickness and metal alloy combination along the lm width) can be used
to obtain high energy density, high performances and special characteristics, focused on particular application needs.
The segmented metallization design of the metal layer over the dielectric, is shaped in a way to allow small part of it to be isolated in case of local
short circuit or breakdown. The aim is to obtain the restoring of the full functionality of the unit with a negligible loss of capacitance, restraining
the propagation of the energy involved in the clearing to other sections of the winding. This prevents the possibility of dangerous failures which
may cause the destruction of the components and of the equipment where they are used, with smoke, re and explosion danger. This might be
especially critical when several units are connected in parallel to obtain high-energy and high-capacitance banks. In case of particularly stressing
operating conditions or overstresses, it may results in clearings taking place with the energy of the full capacitors’ bank discharging through
the clearing point (localized overload risk). For this reason, in such layout conditions, the segmented executions versions should be taken in
consideration. However this theoretically higher safety level implies a lower volumetric eciency, a possible increase of the Equivalent Series
Resistance (ESR) and of the related Dissipation Factor (DF), with respect to a comparable not segmented metallization (see the related picture).
Also the Irms max. ratings are correspondingly slightly decreased. The latter considerations depend also on the design of the segmented pattern,
which is typically related to the foreseen application.
A3- Self-healing
Self-healing (or clearing) process consists in the removal of imperfections, pin holes and dielectric lm flaws which can cause permanent voltage
breakdowns when voltage is applied to t he capacitor.
The electric arc which takes place with breakdown, evaporates and changes the characteristics of the surface metallized area around the fault,
insulating the defect: the capacitor almost instantaneously regains its full operation ability.
The time necessary for self-healing process is usually less than a few μs and the electric arc occurs only if the necessary energy is available either
as charge energy or as external energy.
Self-healing occurs only occasionally, thanks to the capacitor design (lm metallization characteristics, dielectric lm thickness and lms disposal and
combination in the winding) even when the maximum voltage allowed is continuously applied to the capacitor up to the higher temperature limit.
Moreover, only fractions of the total energy stored in the capacitor are dissipated during the self-healing process, therefore the related voltage
drop remains low, unless potentially critical operative and layout conditions are present. Please refer to point A2.
When prescribed by approval normative, capacitors having self-healing characteristic are printed with “SH” or “#” symbol.
For segmented metallization design, please refer to paragraph A2.
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General technical information
Clearing AreaBreakdown channelInterrupted gates
a and b: not segmented metallization;
c and d: examples of segmented metallization.
Eects of clearing on the two dierent lm metallization designs.
A4- Mixed lm-foil and metallized lm capacitor technology
The combination of lm-foil and metallized lm technology typically oers the advantages of the two above described types, obtaining selfhealing property, high current and pulse capability and low losses with extended frequency ranges.
On the base of the foreseen application and needed capacitors characteristics, metal foils electrodes can be replaced by double side metallized
lms and some types also cover high voltage ranges thanks to a particular inner structure design.
Since these kinds of capacitors maintain the self-healing capability, they are conventionally classied among metallized lm capacitors.
A5- Dielectrics
Many dierent materials and plastic lms may be used as a dielectric. The main dielectrics used in ICEL S.r.l. products are:
Polyester
Polypropylene
(Polycarbonate is no more available / in use: EXPIRED SERIES - NOT FOR NEW DESIGN)
The use of dierent dielectrics gives dierent characteristics, performances and behavior to the capacitors: dierent dielectric types are adopted
as a function of the design needs and foreseen application characteristics.
Dierent types of the same general lm type are available, having dierent characteristics and allowing dierent performance levels (for example
dierent temperature grade polypropylene lms).
A comparison of the main, average characteristics of the above plastic lm dielectrics is shown in the following table:
Comparative table of plastic film dielectric main characteristics (typical values)
Water absorption (% in weight), typical0.20.3<0.010.1
Density (g/cm
*Special base lm and execution for high temperature applications
3
), typical1.391.210.911.05
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General technical information
A6- Capacitors winding
Capacitive elements are obtained rolling together a stated number of dierent types of lms (plain and metallized) and metal foils, having
characteristics, arrangement and sequence function of design targets, obtaining cylindrical rolls called windings (in the following examples, it is
shown 2 sections inner series connection scheme only but, depending on design, sections can be many more).
Extended metallized film designExtended metallized film design
with internal series connection
(series connection of 2 elements)
Extended double side metallized
carrier film design
Extended foil design
Plain film (dielectric/ protection)
Metal foil (electrodes)
Single side metallized film
( dielectric+electrodes)
Extended foil design with internal series
connection and metallized film
(series connection of 2 elements)
Extended double side metallized carrier
film design with internal series
connection and metallized film
(series connection of 2 elements)
Double side metallized film
(electrodes)
Sprayed metal head contact
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A7- Capacitors assembly and testing
The capacitive windings are submitted to thermal treatments, heads contact spraying and then are submitted to 100% clearing and electrical
parameters pre-testing.
The windings can be flattened (getting oval transverse section), in order to obtain axial or dipped units having specied dimensions or to be inserted
in box. After the terminals welding, the units are nished in accordance with specications (wrap and ll, dipped, sealed in box style and so on).
Additional 100% or statistical checks are executed at dierent points of the production cycle to guarantee the materials and capacitors conformity
with specications.
At the end of the production cycle, capacitors are submitted to nal tests (100% of the production, net of exceptions) and printing, in accordance
with reference standards and applicable approval normative.
Then they are packed for shipment or storage.
ICEL S.r.l. Quality Assurance system is in conformity with ISO9001 normative (please refer to ICEL S.r.l. web site www.icel.it for details and current
approval state and additional certications availability).
B-Technical terms (reference standards: EN, IEC, CECC and DIN normative; for other applicable references please refer to the single type
specication) and general technical data
B1- Nominal Capacitance (C
It is the capacitance value for which the capacitor has been designed.
If not dierently specied, it is typically measured at 1kHz ±20% at a max. testing voltage 3% of the rated voltage or 5V (whichever is the lowest),
at 20°±5°C.
Capacitance rated values are typically graded in accordance with E series (refer to E series table; paragraph B38).
B2- Capacitance Tolerance
It is the maximum admitted deviation from the nominal capacitance value C
letter codes.
Preferred tolerance values and correspondent letter codes are:
±1%= F; ±1.25%= A; ±2%= G; ±2.5%= H; ±3%= I; ±5%= J; ±10%= K; ±20%= M
M letter code may not appear in units printing. In this case the capacitance tolerance is assumed as ±20% by default.
or Cn)
N
n, measured at 20±5°C. It is expressed in % or with related tolerance
B3- Temperature Coecient of Capacitance (α)
Applies mainly to capacitors of which the reversible variation of capacitance as function of temperature is linear or approximately linear and can
be expressed with a certain precision.
It is the rate of change with temperature measured over a specied temperature range within the category temperature range. It is normally
expressed in parts per million per degree Celsius (10-6/°C) referred to 20°C and shall be calculated as follows:
C0 =capacitance measured at 20±2°C
q
C
qi = temperature measured on test
=20±2°C
0
= capacitance measured at q
i
i
B4- Long Term Stability
It is the maximum irreversible capacitance change after a period of 2 years at standard environmental conditions (refer to “Storage conditions and
Standard environmental conditions”; paragraph D).
B5- Rated Voltage (U
The rated voltage is the voltage for which the capacitor has been designed.
It is the maximum direct voltage (U
applied to a capacitor at the rated temperature T
(unless other declared limitations or otherwise stated in reference specications).
or Ur; Urms; UN; U
R
) or the maximum r.m.s. (Urms) alternating voltage or peak value of pulse voltage which may be continuously
R
)
NDC
and at any temperature between the lower category temperature TA and the rated temperature TR
R
For capacitors for power applications it might be used also,
U
: maximum operating peak voltage of either polarity of a reversing type waveform for which the capacitor has been designed
N
U
: maximum operating peak voltage of either polarity but of a non-reversing type waveform, for which the capacitor has been designed, for
NDC
continuous operation.
Important: always refer to what indicated at type specications about the applicable voltages values and waveforms applicable and allowed.
B6- Category Voltage (U
It is the maximum voltage that can be applied continuously to a capacitor at its upper category temperature T
)
C
.
B
B7- Temperature De -rated Voltage
It is the maximum voltage that may be applied continuously to a capacitor, when it is at any temperature between the rated temperature T
the upper category temperature T
B
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and
R
Page 13
General technical information
+95+80+85+60+40+200-20-40
Max rms Current versus temperature (power capacitors)
Tamb (°C)
x 0,82
x 0,58
+100
B8- Superimposed AC Voltage
When alternating voltage is present, the working voltage of the capacitor is the sum of the direct voltage and the peak alternating voltage. This sum
shall not exceed the rated voltage value, unless dierently specied.
B9- Permissible AC Voltage up to 60Hz
It is the pure sine wave voltage that may be applied to the capacitor at a frequency up to 60Hz. The dissipated power and currents must be
considered in case of operation at higher frequency. The AC rated voltages stated for each series refer to an operating frequency of 50÷60Hz
and sinusoidal waveforms (no transient
obtained from the AC voltage versus frequency graphs of each capacitor series. If not dierently specied, the graphs are referred to an estimated
typical capacitor temperature rise from the ambient temperature of +10°C.
Warning: even if the permissible AC voltage covers the lines voltage range, standard lm capacitors are basically not suitable for operation in direct
connection to public power networks. Unless not specied and if not approved in accordance with related applicable normative, capacitors cannot
be used as class X or class Y units.
B10- Test Voltage between terminals (Ut)
It is the specied voltage value that may be applied for a specied time to the capacitor to test its dielectric strength. The occurrence of self-healing
during the application of test voltage is typically permitted for metallized lm capacitors.
Warning: unless dierently specied, many capacitors connected in parallel or self-healing capacitor connected in parallel with other capacitors
types should not be tested without using adequate limiting discharging devices and care. Discharging or protecting devices are necessary to
prevent the rapid dissipation of the complete energy of the capacitors bank at the breakdown and clearing point, in case of self-healing, which
can cause the damage (even hidden, not visible or immediately detectable) or destruction of the self-healing capacitor.
consideration when making voltage proofs and high voltage tests prescribed by relevant normative on equipment where several connected
together capacitors are used.
voltages). The permissible AC voltage at frequency over 60Hz, under sinusoidal waveforms, can be
This must be taken in
B11- Test Voltage between terminals and case (Utc)
It is the specied voltage value (insulation voltage) that may be applied for a specied time to the capacitor between its terminals and case to test
insulation characteristics of its external protection. The occurrence of breakdown or discharge during the application of test voltage is not admitted.
B12- Non Recurrent Surge Voltage (Upk) and Recurrent Peak Voltage (Upkr)
Upk is the maximum non recurrent peak DC voltage that may be applied to the capacitor for a limited number of times and for a short period. The
application of voltage higher than Upk may result in premature dielectric failure, capacitors damage and reliability reduction. Upkr is the maximum
recurrent peak DC voltage that
may be applied, under specied conditions, during the life of the capacitor.
B13- Rated Ripple Current (Ir)
It is the r.m.s. current value of the maximum allowable alternating current of a specied frequency at which the capacitor can be operated
continuously at a specied temperature.
B14- Rated r.m.s. Current (Irms)
It is the highest permissible r.m.s. value of the continuous current flowing through the capacitor at the specied max. case temperature,
corresponding to a specied T rise with respect to the ambient temperature, and within an allowed frequency range. Upon sinusoidal conditions
Unless dierently specied, the typical reference ambient temperature (θamb or Tamb) is +70°C for power capacitors. If not dierently indicated
in the reference specications, the Irms of the power series must be typically de-rated in relation to the ambient temperature according to the
following graph (for the derating due to skin eect in case of short duration of peak current refer to correspondent graph; paragraph C2):
rated Irms (A)
x 1
Irms de-rating
No Irms de-rating
Irms and Voltage de-rating
Curve a: DCB, DCS, PHC, RHB, RMC, PPS, PPA, RSB, RMB, MAR.
Curve b: other series for power applications.
Always refer to the max. operating temperature at specications.
Irms NOT ALLOWED for safety reason
0
ab
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General technical information
B15- Max. Repetitive Peak Current (Ipeak)
It is the maximum value of the repetitive peak current that can be applied to the capacitor. Refer to Pulse Rise Time (du/dt) and Waveform Energy
Content (K0); paragraph B21.
B16- Max. Non Repetitive Peak Current (Ipk)
It is the maximum non recurrent peak current that may be applied to the capacitor for a limited number of times and for a short period. The application of higher peak currents than Ipk may damage the capacitor permanently, even in a not immediately visible and detectable way.
B17- Category Temperature Range
It is the range of temperature for which the capacitor has been designed to operate continuously.
It is dened by the temperature limits of the appropriate category (between T
and TR at rated voltage; up to TB at de-rated voltage).
A
B18- Lower Category Temperature (T
It is the minimum and the maximum ambient temperature for which the capacitor has been designed to operate continuously (between TA and T
) and Upper Category Temperature (TB)
A
at rated voltage; up to TB at de-rated voltage).
B19- Rated Temperature
It is the maximum ambient temperature at which the rated voltage may be continuously applied.
B20- Ambient Temperature (θamb or Tamb)
It is the temperature in the immediate surrounding of the capacitor and it is identical with the body surface (case) temperature of the unloaded
capacitor.
B21- Rated Pulse Load, Pulse Rise Time (du/dt) and Waveform Energy Content (K
The Rated Pulse Load is the maximum pulse load that can be applied at a certain pulse repetition frequency to the terminations of a capacitor at
)
0
any temperature between TA and TR.
The pulse rise time is the slope of voltage wave shape during charging or discharging of the capacitor and it is expressed in V/μs. The maximum
pulse rise time value is typically referred to the rated voltage of the capacitor.
The current loading correspondent to the pulse rise time value is:
Ipeak in A, C
in μF, du/dt in V/μs.
N
The peak current flowing through the capacitor, causes a localized heating of the contact area in the capacitor, due to contact resistance between
terminals - metal sprayed on the winding heads - electrodes of the winding (winding lm contact edges or metal foils).
Note: the contacts localized heating extend to the entire capacitor body, when the pulse stress is repetitive and constantly applied.
The energy W involved in the heating can be obtained by the formula
Ri = inner resistance
R
The energy content of the waveform applied to the capacitor is dened as follows
t = pulse width
K
At low voltage or medium-low pulse levels, when working at lower voltage Ua than the rated voltage U
rise time= du/dt at specication x U
In any case, correspondent Ipeak must be ≤ Ipk (max. non repetitive peak current admitted) and maximum K
not be exceeded in order to avoid a dangerous overheating of the capacitors.
is expressed in V2/μs
0
/ Ua.
R
, capacitors may be operated at a pulse
R
values stated in specications must
0
Note: in any case, for safety reasons, in the above conditions do not overcome 1,5 x rated du/dt value
B22- Equivalent Series Resistance (ESR)
It is the resistive part of the equivalent series circuit.
It is due to the resistivity of electrodes, internal connections and dielectric losses and depends on frequency and temperature.
the capacitive reactance and dissipation factor of the capacitor by the formula:
C = capacitance in Farad
ω = 2πf (f = frequency in Hz)
0.8
The ESR is related to
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General technical information
B23- Dissipation Factor (tgδ or DF)
It is the power loss of the capacitor divided by the reactive power of the capacitor at a sinusoidal voltage of a specied frequency.
value of the dissipation factor is known as the quality factor Q.
B24- Impedance (Z)
It is the magnitude of the vectorial sum of the ESR and the capacitive reactance in an equivalent series circuit, not considering the negligible self
inductance
B25- Power Dissipation and Thermal Resistance (Rth)
A real capacitor will dissipate as heat a fraction of its energy.
The amount of this dissipation is strictly dependent on the technical and design choices and materials used characteristics.
It is also related to the kind of usage and application conditions, performances target, reliability, expected life and sizing.
Is then a complex compromise of several dierent interacting factors.
Not considering inductances and electromagnetic losses caused by currents potentially induced by strong electromagnetic elds in not non-magnetic metal parts or cases, the main factors related to losses are:
-Rd: equivalent parallel resistance related to dielectric losses, mainly related to polarization phenomena in the dielectric mass (prevalent at low
frequencies).
Related power dissipation= 2Eω x tgd
tgd
: dissipation factor of the dielectric
0
-R
: equivalent parallel resistance related to the Insulation Resistance (leakage), corresponding to extremely low current flowing through the
INS
dielectric when a voltage is applied (sensible to high temperature, negligible except for extremely low frequency).
= ωxC x V2 x tgd0
0
-Rs: equivalent series resistance related to connections to the capacitive element dielectric, including terminals, heads spraying, winding
heads surface contacts and lm metallization (electrodes).
Rs depends on frequency, because it is aected by the skin eect (prevalent at medium-high freq.).
Important note: Rs is not equal to the ESR.
Related power dissipation= Rs x I
2
Nevertheless, a real capacitor can be at rst order, protably modeled as a perfect capacitor in series with a resistance including ALL the
relevant “contributes” causing losses.
This resistance is the ESR= equivalent series resistance, related to frequency and Cap. value by the already seen formula
tgδ= ω x ESR x C
Important: capacitors ESR (and DF) can be directly measured and read with RLC bridges, this gives an immediate and easy possibility to estimate
losses and power dissipation on the base of ESR.
(Global) Power dissipation in the component= Pd= I
2
x ESR
Important: DF and ESR are not constant with frequency, always consider limitations given in the type specications.
The power dissipation Pd, can be calculated as follows
The reciprocal
P = dissipation in Watt
Vrms
f
C = capacitance in Farad
tgδ(f
n = number of signicant harmonics
= r.m.s. voltage of the ith harmonic in Volt
i
= frequency of the ith harmonic in Hz
i
) = dissipation factor at the frequency of the ith harmonic
i
In case of sinusoidal waveforms (n=1), the formula is
This formula may be also used to approximate the capacitor dissipation when submitted to non sinusoidal or pulse conditions, where
Pd = dissipation in Watt
Vrms = r.m.s. value of the AC voltage
f = repetition frequency of the pulse waveform
C = capacitance in Farad
tgδ = dissipation factor at the frequency of the steepest pulse part (pulse frequency=1/ pulse width)
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General technical information
The maximum power dissipation admitted for a capacitor under normal conditions, depends on many dierent factors like the execution, design,
shape, dimensions, materials and so on.
An estimated value of the power dissipation capability may be calculated with the following formula
K [mW/ (°C x cm2)]: it can assume dierent values in function of dierent types, design and executions of the capacitors; typical values are in the
range 0,7÷1,8.
Lower K values are typical for general purpose metallized lm capacitors and capacitors having construction and shape not suitable for high heat
dissipation (units having long length or wide pitch compared to the other sizes, small surface heads).
Higher K values are typical for lm-foil capacitors and capacitors having specic design, construction and shape suitable for high heat dissipation
(wide surface heads, short length and narrow pitch compared to the other sizes or thin shape) like power capacitors.
The heat transmission from the inside to the surface of the capacitor is typically much more efcient and fast along the metallized or metal layers
of the winding than through the dielectric: high K values are typically related to capacitors having wide heads surfaces compared with the total
dissipating body surface or capacitors with low transversal section.
Separated double side metallized current carriers (the metal ones even more eectively) or special design metallization lms do typically allow
a better heat dissipation, helping the heat extraction from the inside of the capacitors body, as also supported by wide section and oversized
terminals like lugs or multiple pins.
The choice of types having lower K values will ensure higher safety margin in Pd estimation.
2
S: case surface (cm
Parts of the capacitors surface not able to adequately dissipate the heat because of capacitor position or other limitations, like the radial–box
capacitors face laying on PCB surface, should not be taken in consideration.
ΔT (°C): dierence between the hot spot case temperature of the capacitor in stationary working conditions and the ambient temperature
(example: assuming an ambient temperature = +55°C, if the hot spot case temperature of the working capacitor has to be maintained ≤+70°C, the
maximum ΔT must be 15°C).
The heat transmission mode in the capacitors body and dissipation capability depends on a high number of factors, such as materials constituting
the capacitor intrinsic physical characteristics, connections shape and mass, capacitors shape, sizes, dimensional ratios, useful surface dissipation
and environmental conditions.
For capacitors having a relatively simple and almost homogeneous structure, the above can be simplied taking under control the case surface
temperature reached at steady state under a known power applied, on the base of a known ambient temperature.
Measurable hot spots are typically at the heads contacts, bottom box heads, where terminals contact the winding heads or at the lateral walls
perimeter near box heads or at the center of the lateral box walls corresponding to the middle of the winding.
At steady state condition, the relation between power dissipation and capacitor temperature rise is expressed by the ThermalResistance (Rth):
)
So, the total operating temperature of the capacitor can be estimated with:
Too high ΔT due to power dissipation shall be avoided because it may lead to capacitor over-stress resulting in reliability and expected life reduction
or damage. As a general indication, capacitors having metal foil electrodes, double side metallized electrodes or specically designed power types
better withstand heating stresses.
Important: in the specications about capacitors series for power applications, Irms ratings are typically referred to a max. ΔT of +15°C from
ambient temperature (operation at rated power, current, voltage, at natural cooling, +70°C or +85°C observing voltage and current derating;
unless dierently specied).
Nevertheless, for safety reasons and unless dierently specied, following suggested max. ΔT due to power dissipation shall be considered when
capacitors operate at high temperatures, near the rated maximum operating ones:
≤ 10°C at +85°C ambient temperature whichever is the type of capacitor considered
≤ 5°C at +85°C ambient temperature for general purpose metallized polypropylene lm capacitors (capacitors not having metal foil or double side
metallized electrodes and not designed for power applications).
Moreover, in case of special operating and cooling condition, the ΔT must be anyway limited to reasonable values: ΔT +20°C max. for general
purpose capacitors and +40°C max. only for special capacitors designed for power applications, provided that evaluation and adequate tests have
been performed. And after that the above data and results and related reliability levels and performances respect is judged acceptable upon
discussion and analysis with ICEL S.r.l. technical oce.
As a general indication, with all the other conditions unchanged,
- a ΔT limited to about +10°C can be obtained applying a Irms reduced to about 0.82 x Irms max rated.
- a ΔT limited to about +5°C can be obtained applying a Irms reduced to about 0.58 x Irms max rated.
If not dierently indicated and permitted in accordance with reference specications, avoid operation conditions which cause relevant power
dissipation at ambient temperatures over +95°C, even in case of capacitors having higher rated upper category temperature.
During stationary operation, the capacitor temperature must be always lower than the max. operating temperature stated for the capacitor.
Important note: maintaining a safe temperature margin, avoiding the reaching of the max. temperature limit, increases the capacitors reliability
and expected life.
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δ
Alternating voltage and current versus frequency
Vrms; Irms
f
Therefore, power dissipated under operation must be always lower than the max. power dissipation rated Pd.
If the above condition is not respected, possible actions are:
- reduction of the ambient temperature
- forced air cooling (in any case taking in consideration the heating level inside the capacitor)
- parallel connection of many capacitors
- use of dierent type of capacitors or capacitors having better dissipation characteristics
Important: regardless of the estimated Pd, always consider the max. voltage and the max. current (and their de-rating, if applicable) tolerable by
the capacitor and in particular the current capability allowed by the terminals type.
In fact, a theoretical obtained Pd value may correspond to higher voltage values than permissible Urms voltage (over ionization level at mediumlow frequencies) or may correspond to current values not tolerable by the capacitor and its terminals (at medium-high frequencies).
In other words, it must be considered the rated a.c. load, expressed as:
a) rated a.c. voltage at low frequencies
b) rated a.c. current at high frequencies
c) rated reactive power (var) at intermediate frequencies
The typical capacitor Urms and Irms (sinusoidal waveform) limits versus frequency are as follows:
Constant IrmsConstant Vrms
I: area where voltage is limited by ionization
II: area where voltage and current are limited by reactive power dissipation and tg
III: area where current is limited by terminals characteristics
Irms
Vrms
The following indicative max. current values, as a function of the terminals type, shape and section (referred to a single terminal) shall be taken in
consideration (referred to +70°C):
section= up to about 14A
Lugs used for axial units (MPHL type)= up to about 25A
Other lugs types= up to about 35÷40A (depending on type and shape)
Important factors when estimating the capacitors terminals-contacts current capability, are the terminals welding mode, the contacts welded
surface, the winding heads spraying type and thickness and the capacitor working temperature.
For this reason, the above listed currents must be considered as indicative values.
Always refer to the capacitors specications to obtain max. rated current limits.
If needed data are not present in the capacitors specication, not corresponding or referred to the operating conditions (particularly
in case of severe application with complex voltage and current waveforms which may cause relevant power dissipation and capacitor
heating), ICEL Technical Oce must be contacted to ensure the use of the correct kind of capacitor for the application.
ICEL S.r.l. is not responsible for problems caused by critical usage and application, not preventively discussed and acknowledged by ICEL
Technical Oce
Moreover, since above data are based on very generalized assumptions, they do not allow absolute correct deductions in case of critical cases: a
practical test at the real working conditions shall be made to verify the correctness of the theoretical assumptions.
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B26- Self Inductance (L) and Resonant Frequency (fr)
Self inductance mainly depends on the inductance of the connecting terminals and of the winding.
Thanks to heads metal spraying that connects all the winding turns, the self inductance is typically extremely low.
Since the inductance can be reduced but never completely eliminated, at a certain frequency (fr ) the capacitive and inductive reactance are equal.
fr is called resonant frequency and at frequencies greater than fr the inductive component of the capacitor prevails.
The inductance values indicated in the specications are typical and referred to the resonant frequency, at 20±5°C.
B27- Insulation Resistance (R
The insulation resistance R
tric (R
between terminals, determined by the dielectric characteristics) and over the capacitor surfaces (R
INS
by the quality and characteristics of the insulating materials, such as insulating tapes, plastic boxes, sealing resins and so on).
So, R
is the ratio of an applied DC voltage to the current flowing after a specied time. It is dependent on temperature, voltage and time.
INS
The time constant (τ) of a capacitor is the product of R
) and Time Constant (τ)
INS
of a capacitor is a measure of its resistivity in DC. Under a stationary DC voltage, a leakage current flows through the dielec-
INS
and the Capacitance value.
INS
between terminals and case, determined
INS
B28- Test Categories (reference: IEC 60068-1)
Capacitors can be graded in accordance with the following 3 groups of test categories; they result from the test conditions according to which
capacitors have been tested:
TestPreferred values
A (cold, °C) IEC60068-2-1-65-55-40-25
B (dry heat, °C) IEC60068-2-2+70+85+100+125
C (damp heat test Ca, steady state, days) IEC60068-2-3*04102156
*unbiased unless dierently specied
Example:
Test category= 40/085/56
test A= -40°C; test B= +85°C, test C= 56 days
B29- Permitted Temperature and Humidity (reference: DIN40040)
They are dependent on capacitor type and are identied in accordance with DIN40040:
Permitted temperature and humidity in accordance with DIN 40400
st
1
code letterEFGH
Minimum temperature (°C)-65-55-40-25
nd
2
code letterSPMK
Maximum temperature (°C)+70+85+100+125
rd
3
code letter humidity categoryGF(E3))DC
Average relative humidity≤65%≤75%≤80%≤95%
30 days per year, continuously
1)
-95%100%100%
60 days per year, continuously85%---
For the remaining days, occasionally
1) These days should be suitably spread evenly out over the year.
2) Keeping the annual average.
3) For humidity category E, rare and slight dew precipitations additionally permitted
2)
75%85%90%100%
Important: lm capacitors prolonged exposure to combined high humidity and high temperature will produce dangerous irreversible eects,
therefore it must be avoided.
Related critical environmental conditions must be carefully evaluated since potentially leading to a rapid deterioration of the performances and
reliability (also refer to paragraph C10).
Direct contact with liquid water or excess exposure to high ambient humidity or dew will eventually remove the lm metallization and thus
destroy the capacitor.
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r 3s
T
Simulations of the eect of humidity can be done through the humidity test dened in the climatic category.
Accelerated testing can be performed under more severe conditions, if the relative severities are taken into account.
The stress entity is related to the relative humidity and temperature.
Moreover, possible voltage load highly increases the stress level and the acceleration of the detrimental eects, resulting in a very fast failure
probability unless performed on specically designed and rated types.
For this reason, reference damp heat tests are not typically performed with voltage applied, unless dierently indicated in the type specications.
Only special designed and specically THB (Temperature Humidity Biased) rated capacitors shall be considered for harsh environment
conditions usage (and may be submitted to biased humidity tests).
B30- Solder conditions for capacitors on printed circuit boards; terminals RoHS compliance
Solder bath (soldering iron to be carefully executed) temperature and time must be set to obtain good solderability avoiding the components
damage. The soldering temperature must be set keeping the temperature inside the capacitors below the following general limits:
+110°C for KP and MKP units (+100°C for radial units with leads pitch P≤ 7.5mm or axial units with body length L≤ 10.5mm)
+155°C for MKT (KC and MKC) units (+145°C for radial units with leads pitch P≤ 7.5mm or axial units with body length L≤ 10.5mm)
Temperature prole:
emp (°C)
350
IRON
T
0.9 x T
DIPPING
0346Times (s)
T= 260±5°C for 4s (general*)
* for KP/MKP P=5; 7.5mm and L=10.5mm: Tmax. = 250°C fo
Pre-heating: it must be made at +110°C max. for 1 min. max. (+100°C max. for KP/ MKP units with leads pitch P≤ 7.5mm or axial units with body
length L≤ 10.5mm).
Avoid excessive thermal stress which may result in the capacitors damage, in particular for small size units.
General soldering conditions:
- if repeated PCB soldering cycles are needed, it is necessary a recovery time until the capacitors surface temperature is below +50°C
- eflow soldering by combining the leaded types with SMD ones must be avoided
- when xing SMD parts in combination with leaded ones, any passing through adhesive curing oven must be avoided
- capacitors with radial terminals must rest stably on the PCBs.
- for axial terminals capacitors has to be kept a soldering distance of min. 6mm between the capacitor body and the solder connection
- it has to be kept a min. 1.5mm distance for vertical mounting (only upon agreed execution and when the vertical mounting is exceptionally
allowed)
Warning: the permissible heat exposure on lm capacitors is limited by upper category temperature. Long exposure to temperature levels
above this limit cause irreversible changes of the capacitor characteristics or its damage.
In addition to solder bath temperature and the soldering process time, thermal load applied to the capacitor is also aected by pre-heating and post
soldering temperature.
Since the soldering heat is mainly transmitted in the units through the leads, the process is more critical for small size capacitors.
For critical types capacitors soldering, in addition to checks of the process eect on the capacitors, a particular care is required; the keeping of
maximum possible distance from solder bath, the use of solder resistant coatings or shields and the forced ventilation cooling is necessary.
the
pre-heating cannot be avoided, the soldering process conditions should be possibly readjusted.
Particular assembly need, like welding on metal bars or other relevant mass conductors, requiring long time, high heating levels exposal,
potentially causing inner contacts damages or hidden deterioration must be avoided or made by taking the utmost care and attention.
Terminals RoHS compliance: terminals are Lead-free and i n con form ity w ith R oHS and REACH requirements (please refer to the web site www.
icel.it for detailed information).
Typical terminals structure is 100% massive copper with matte (double) Tin coating.
When
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B31- Dimensions, tolerances, terminals position and centering, lugs screws xing torque and connection modes
Dimensions and materials may be subjected to reasonable variations due to available raw materials and normal fluctuations in the
manufacturing process; moreover, high stress working conditions, like operation at maximum ratings and at the max. rated temperature and
humidity, may cause dimensional variations which should be taken into account when designing capacitors placement in equipment and on PCBs.
Tolerances on dimensions are usually specied for every type in the series specications.
Box with radial terminals capacitors:
Unless otherwise specied, the following tolerances on nominal box dimensions “Bd” declared must be taken in consideration:
Size tolerances
Bd (mm)Tolerance (mm)
≤ 10±0.30
10 < Bd ≤ 18±0.45
18 < Bd ≤ 32±0.60
32 < Bd ≤ 42.5±0.80
> 42.5±1.0
Radial terminals position (wire terminals): the terminals o-set To from the capacitors body longitudinal center-line is
To≤ d (d= terminals diameter)
but need not to be lower than 0,8mm; for 4 or 6 x terminals versions, the maximum terminals o-set To from the symmetrical position from the
capacitors body center-lines is To= 1,5 x d (d= terminals diameter)
Axial terminals capacitors:
Axial terminals position and centering (99,7% of the pieces): the centering error from the capacitors body axis is
Ce ≤ (Y/X)+d
where d is the terminals diameter and Y is the nominal diameter or thickness.
Y = D or B (mm)X
In any case, Ce need not to be lower than 2 x d (d= terminals diameter).
0,3% of the pieces may show terminals centering error up to 1,2 x the above limits.
Important: the vertical mounting of axials on PCBs is generally not allowed. Only exceptionally this can be considered after evaluation and
discussion with ICEL Technical Oce, needing special capacitors execution and mounting care.
Box capacitors with lug terminals:
Lugs position: within drawings quotes and tolerances specied for each type and lug style, the lateral shifting of lugs position referred to
center-line must be ≤ 2.5mm, unless dierently specied. A little lugs inclination, lacking of parallelism or lugs xing surfaces laying on slight oset
planes is admitted, if not aecting the xing pitch and the correct mounting and xing.
Lugs screws xing torque: 5Nm max. The xing force must be enough to ensure the electrical connection and a stable positioning and
contact against vibrations and mechanical stresses (it is necessary and enough that the connection is not loose, not allowing the capacitor body
free moving; excess torque is almost useless).
Lugs material: lugs are normally made with (lead free tinned) massive copper (brass as a possible alternative, upon specication)
WARNING: lugs bent, torsion, inclination or any change of the original design, shape, geometry and position for mounting and
xing of
weakening or even sealing cracking.
Box capacitors with cable terminals:
Cables position: within drawings quotes and tolerances specied for each type, the cables exit point position from the sealing is not ruled
and standardized, even if typically located near the box head walls, almost at the centerline of the sealing, unless dierently indicated in
specications upon agreement with customers.
Cables sealing: at the exit point from sealing, cables are not required to be exactly perpendicular to the sealing surface, unless dierently
indicated in specications upon agreement with customers.
In any case the cable sheath must be completely and permanently xed and surrounded by the sealing, without showing unprotected or
unsealed cables conductors.
the capacitors onto equipment contacts is not admitted, since potentially causing contacts irreversible damage, mechanical
≤ 169
> 16 and ≤ 3411
> 3410
the box
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B32- Standard Environmental Conditions for Test
Unless otherwise specified, all the electrical data stated in the specifications are referred to a temperature of +15÷35°C, an atmospheric pressure
of 86÷106 kPa and a relative humidity of 25÷75% (reference: IEC 384-1).
Main electrical parameters variation in function of temperature and frequency. General data for comparison aims only, based on typical estimations.
The real behavior of each single capacitor and its parameters variations versus temperature and frequency may be quite different from the
following typical curves, depending on capacitance value, execution, shape, design-construction and several other interacting factors.
The reference reliability states a component type fraction failure under a dened load or operating condition. This fraction failure will not be
exceeded within a specied operating time.
The reference operating condition to which the reliability and failure rate are referred is typically +40°C with 0.5 x Ur (DC) continuously applied to
the capacitor (no humidity considered); for capacitors for power applications the maximum ratings are taken as a reference (without de-ratings
applied and no humidity considered). Unless dierently specied at types specications.
Failure rate λ is the fraction failure divided by a specied operating time and it is expressed in t (failure in time), as follows:
1 FIT= 1 x 109 / h (1 failure per 109 component hours)
Failure rate, when available, is referred to failure rate criteria like short or open circuit, main electrical parameters variation limits and so on,
declared in each series specication.
Typical failure criteria:
- short or open circuit
- capacitance variation >±10%
- Dissipation Factor variation > 2 x initial limits
- possible additional criteria to be indicated in the type specication
- excessive body distorsion (refer to size tolerances)
In order to estimate the typical expected failure rate as a function of load or operation characteristics dierent from the one taken as a reference
for nominal failure rate, following conversion factors (CF) may be used:
Working Voltage (Uw/Ur)CFWorking Temperature(°C)CF
1x 20≤ +40x 1
0,75x 4+55x 2,5
0,5x 1+70x 6
0,25x 0,4+85x 15
0,1x 0,2(+ 100)(x 45)
The estimations shall be made within the allowed operating limits.
Typical components failure rate curve in function of time, shows three characteristic periods in the components life:
- a rst period (I), when early failures occur
- a second period (II) during which the failure rate can be considered approximatively constant
- a third period (III) when failures increase due to aging wear:
Failure rates data at specications are typically referred to the second period (II) only.
WARNING: gures stated about expected life and failure rates are mainly based on application experience and accelerated ageing tests; they are
referred to average production conditions and must be considered as mean values, based on statistical expectations for a large number of lots of
identical capacitors.
The above information and data must be considered as general indications. Always refer to the data listed in the specications for each
type of capacitor. The above information are referred to the typical behaviour of the single component, net the possible layout of several
units connected in series/parallel, which may increase the global risk upon critical operating conditions.
Please refer to the related paragraphs.
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B35- Life expectancy (Le)
The Life Expectancy of the power capacitors series is typically referred to a reference nominal voltage Un and to the hot spot temperature of the
capacitor case (the typical reference temperature is stated at type specications).
The Life Expectancy may be improved derating the operating voltage and/ or the operating temperature.
Important: capacitors used in power applications are typically exposed to relevant stresses level and possible failure may result in very serious
consequences. For this reason, the keeping of a wide safety margin (about 25÷30%) compared to ratings is a wise and long term protable approach.Life Expectancy as a function of operating voltage can be approximately estimated with the following formula:
Lw= Le (Un / Uw)
Lw (h)= life expectancy at the operating voltage Uw
Le (h)= life expectancy at the voltage Un (given in specications) Un (V)= reference voltage to which Le is referred
Uw (V) = operating voltage (Uw ≤ Un)
E = 7÷8 (typical value; depending on capacitor design and construction)
WARNING: a good approximation of the capacitor behavior can be obtained at Uw values reasonably close to Un reference.
If Uw> Un the life expectancy drops very fast with a big uncertainty of the estimation, that becomes the more unpredictable and unreliable the
higher is Uw/ Un.
Do not operate capacitors over the allowed voltage.
Life Expectancy as a function of the hot spot temperature of the capacitor case can be approximately obtained with the following formula:
E
Lw= Le x 2
Lw (h)= life expectancy at the operating temperature
Le (h)= life expectancy at the reference temperature T (given at specication) T (°C)= reference temperature
Ths (°C)= hot spot case temperature at stationary working conditions (≤ max. rated Operating temperature)
Ac (Arrhenius coefcient expressed in °C)= 7÷8 (typical; depending on capacitor design and construction)
WARNING: the above formula is derived from Arrhenius equation which describes the ageing of organic dielectrics as a function of the temperature.
It gives an acceptable approximation of the capacitor behavior only if the temperature range taken in consideration is not too large and too far from
the reference one.
If Ths> T the life expectancy drops very fast with a big uncertainty of the estimation, that becomes the more unpredictable and unreliable the higher
is Ths/ T.
Do not operate capacitors over the allowed temperature.
Important: obtained estimations are based just on voltage and temperature parameters, NOT considering any other possible stress
source, in particular the humidity level. Whichever is the obtained estimation, orders of magnitude higher than the reference value do not
represent realistic data: keep a rational approach interpreting the result.
The failure rate estimation anyway prevails as a primary criteria to evaluate the reliability of the component The above formulas shall not be used
for estimations outside the specication rating limits..
ICEL Technical Ofce shall be contacted in order to estimate life expectancy data, to ensure the use of the correct type of capacitor for the application
and to evaluate the adequate reliability level for the life time target reference.
To obtain long life and low failures incidence al w ays consider large enough safety margins on ratings compared to application operating
conditions, when choosing capacitors. The above information are referred to the typical behaviour of the single component, net the
possible layout of several units connected in series/parallel, which may increase the global risk upon critical operating conditions.
Please refer to the related paragraphs.
B36- EN60252-1 normative Life Expectancy Classes
The following Life Expectancy Classes are used to rate the capacitors types approved in conformity with EN60252-1 normative:
(T-Ths) / Ac)
Class A: 30000 hours
Class B: 10000 hours
Class C: 3000 hours
Class D: 1000 hours
The Life Expectancy Class is referred to an operating
- voltage
- frequency
- temperature
- possible duty cycle
Related to the EN60252-1 approval class obtained.
The Life Expectancy Class code is printed in EN60252-1 approved capacitors markings.
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B37- Taping specication for axial capacitors
DescriptionSymbolDimensions (mm)
Capacitor diameterD4,5 ÷ 19,5
Capacitor lengthL10,5 ÷ 32,0
Component pitchA*See table I
Reel core diameterE60
Arbor core diameterM16
Reel diameterø340+5
MarkingFSee table II
Tape widthH6±0,5
Body location (lateral deviation)G≤ 0,8
Body locatio n (longitudinal location)N≤ 1,2
Tape spacingBSee table III
Lead length from the capacitor body to the adhesive tapeI≥ 20
Distance between reel flangesCSee table III
* Cumulative pitch tolerance does not exceed 1.5mm over six consecutive components.
Table ITable II (reel marking)
D (mm)A (mm)
< 55
5 ÷ 9,510
9,6 ÷ 14,715
14,8 ÷ 19,520
- Manufacturer’s name
- Capacitor type and code
- Electrical values
- Component quantity
- Date
Table IIITypical capacitor quantity per reel
L (mm)B±2C (mm)D (mm)Qty.
≤ 135375< 52000
1963865 ÷10500 ÷ 1000
> 19739510,1 ÷ 19,5125÷ 350
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B38- E series according to IEC 60063 (preferred capacitance values;
note: dierent, special values may be adopted in specic cases or upon customer request; DIN41426)
E series according to DIN 41426 and IEC 63 (preferred capacitance values).
Rated rms current value versus pulse current duration
10
0.1
0.5
1.0
Irms multiplier
10
10
3
μS
C- Application notes, operation and safety conditions
Because of the many dierent types of capacitors and the many factors involved, it is not possible to cover, by simple rules, installation and
operation in all possible cases. The following information, in addition to single series specications and to the data up to now listed in “General
Technical Information” chapter, are given with reference to the most important points to be considered. Nevertheless, they are not exhaustive: they
need to be completed with careful evaluations about the specic customers applications and operative condition.
C1- Voltage applied and ionization eects
Higher voltage values than the rated voltage applied to the capacitor may cause permanent damage like the dielectric perforation, short circuit or,
in case of metallized lm capacitors, Insulation Resistance progressive decrease and capacitance drop, with reduction of
Capacitors shall be adequately protected in order to prevent potential damages caused by voltages higher than the rated one, due to particular
conditions such as equipment malfunction, equipment test conditions, etc.
Rated voltage (rated current) can be applied at temperatures up to rated temperature.
At higher temperatures than the rated one, an adequate voltage (or current) de-rating must be applied in conformity with each series specications. In
order to guarantee a high reliability and long life expectancy, capacitors for power applications should not be operated at maximum permissible voltage
and maximum operating temperature contemporaneously: this should be considered an emergency operating condition, for short periods of time.
Suggested safety margins should be about 25÷30% lower than ratings.
Capacitors rated voltage is usually specied DC. For AC applications it is suggested to refer to series specically designed for this kind of
check the foreseen main applications at specications and the “Capacitors selection guide”).
If a DC rated capacitor is used in AC applications, do not use higher AC voltages than the one stated at specication.
With the exception of series designed for power applications, the AC voltages stated at specications are referred to sinusoidal waveform.
If DC rated capacitors are used in an application with not sinusoidal or dierent waveforms from what specied at catalogue, ICEL Technical Ofce
must be contacted before using the capacitor to evaluate the application. At high working voltage, ionization may cause a destructive process in
the capacitor,
in the dielectric, between the winding layers of the capacitor and present at the face ends of the capacitive element. If the electric eld in the
capacitor exceeds the air dielectric rigidity, micro-discharges might take place in the winding, damaging the lm metallization and the lm itself.
This usually causes capacitance drop and may also cause overheating due to Insulation Resistance drop, up to short circuit in case of persistent
ionization. The voltage at which ionization phenomenon overcomes a reference limit is called corona on-set or o-set voltage as a function of
taking place at the rising or at the decreasing of the voltage applied to the capacitor.
The grade of the phenomenon and the damage that ionization causes depends on many dierent factors like the amount of air trapped in the
capacitor, the type of dielectric and electrodes, the design and construction, the accuracy of manufacturing process and the working conditions.
To minimize potentially dangerous ionization eects, do always respect the voltage ratings and if possible, choose capacitors having higher
voltage ratings than the foreseen application ones, guaranteeing a safety margin high enough for a good reliability.
In particular, ensure the respect of the following condition:
Vpp (peak to peak voltage) ≤ 2 x √2 x Ur (AC)
often having consequences at medium-long term. The ionization phenomenon (also called corona eect) is due to air contained
reliability and expected life.
usage (do
its
C2- Pulse applications
In case of pulse applications, it is necessary to consider the following main capacitor characteristics and application data (which are the minimum
conditions to be satised in order to prevent capacitors damages):
Vmax. (max. voltage) ≤ Ur (DC)
Vpp (peak to peak voltage) ≤ 2 x √2 x Ur (AC)
du/dt or Ipeak ≤ specications value
K
≤ specications value
0
Urms., Irms and waveform or pulse frequency (1/T): refer to permissible AC voltage versus frequency graphs Upk and Ipk ≤ specications value
Moreover, in case of short current pulse duration, also the skin eect in the contacts and terminations should be taken in account, in accordance
with the following graph:
(lrms multiplier)
2
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C3- Noises produced by capacitors
During pulse stresses or when submitted to AC signals or complex waveforms having high frequency distortion rate, capacitors might produce
buzzing noises due to coulomb forces generated between opposite poles electrodes.
This noise is usually proportional to the size of the stress and its characteristics and may be dierent with dierent capacitor construction and
design. It is not typically dangerous for the capacitor and does not typically relate to any damage or performances reduction of the capacitor.
C4- Permissible current
The main eect produced by the current flowing through the capacitor is its heating. This heating, in addition to the ambient temperature,
Tamb.+∆T due to Irms flowing) must be maintained lower than the maximum operating temperature for which the capacitors have been designed.
An excessive heating reduces capacitors reliability, expected life and performances.
It might cause capacitors deterioration up to a short or open circuit, body deformation and melting with smoke emission or re danger, even if
components are protected by flame retardant materials and/or segmented matallization design.
The fact that dissipation factor may increase at temperature exceeding the max. rated temperature, causes a further dangerous heating eect
which brings to a fast increase of the risk of severe damage of the capacitor.
In addition to current linked with pulse operation (please refer to the related paragraphs), the eective currents (Irms) due to periodic waveforms
cause the entire capacitor body heating.
The combined eect of pulse and rms currents must be taken in consideration when evaluating the capacitor heating in order to avoid a global
over-heating condition. The specications of capacitors for power applications and designed for high current operation list the max. Irms values.
The max. Irms ratings are typically referred to a temperature rise from ambient of 15°C.
Important: the maximum Ipeak and Irms stated at specication must not be overcome. Please contact ICEL Technical Ofce for support in case of
any doubt about application of capacitors subjected to high pulse and rms currents or particular waveforms.
C5- Operating temperature
A capacitor used in AC applications is submitted to heating due to currents flowing through it. The working conditions and the correct choice of
the capacitor must ensure that capacitor working temperature and all the other parameters, remain within the limits stated in the specication.
Operating temperature in excess to the max. admitted or very rapid changes from hot to cold and vice-versa may accelerate electrochemical
dielectric degradation and may cause physical damage to protecting materials (accelerated ageing, sealing breaking and de-touching from box
walls, important drop of the protection against humidity and so on).
The direct test of the capacitor heating over the ambient temperature (∆T) and the Total operating temperature (Ttot. = Tamb.+∆T due to power
dissipation) shall be made at load conditions equivalent to the real operating ones, but also simulating the worst working conditions foreseen in
the application.
The capacitor temperature must be measured at the hottest part of its body surface (typically in correspondence with terminals, near heads areas
or areas having poor dissipation capability because of external reasons like particular disposal on PCBs, presence of other hot components in the
surroundings and so on).
The dissipation factor (and the related ESR) of the capacitor should be measured and compared with specication data, taking in consideration the
typical range of values that dierent units of the same lot and dierent lots of the same type may reasonably have.
Important: the ESR value does not only change with the frequency but also with the Capacitance value. Tolerance on Capacitance must then
be taken in account: max. Irms ratings are typically referred to Capacitance tolerances ≤ ±10%. Moreover, the typical ESR rise in function of the
frequency might be steeper in case of segmented metallization design.
In addition to working conditions in terms of electrical parameters, particular attention must be paid to the correct installation of the capacitor and
its position on PCB and in the equipment.
Capacitors shall be placed where there is adequate dissipation by convection and radiation of the heat produced by the capacitor losses.
The ventilation and cooling of the environment and the placement of the capacitor units shall provide good air circulation around each unit
(considering the global environmental conditions, including humidity).
This is particularly important for units mounted in rows, one above the other: always respect the suggested minimum distances between units.
Extra heating, even if localized on parts of the capacitor body, could be caused by other components or parts in the immediate surroundings either
as a consequence of their heating or as a consequence of strong magnetic elds inducing alternating magnetization and currents in metal parts.
Capacitors should be situated at a safe distance from heavy current conductors.
The influence of other components near to the capacitor under operating conditions must be always carefully evaluated.
(Ttot. =
C6- Components tting on PCBs and arrangement in equipment layout
Dimensional tolerances must be taken in consideration when designing capacitors tting on PCBs and in the equipment (please also refer to B31
paragraph).
The tting of capacitors on PCBs and their arrangements in equipment lay-outs with touching bodies or body faces in contact one with the other must
be absolutely avoided, in particular if capacitors are positioned in rows, one above the other.
A not adequate distance between units would not allow the correct capacitors heat dissipation and cooling, especially in case of power applications
and in equipment where components are submitted to sensible heating.
The contact between capacitors body may also cause physical damage in case of mechanical stresses (vibrations, shocks) and small settlements of the
units body which may occur at
As a general indication, the suggested minimum distance between side by side elements should be at least about 1/12 of the diameter
or thickness in case of axial terminals components and at least about 1/8 of the thickness in case of radial terminals capacitors and
capacitors in box with lug terminals (on all the components faces). Particular attention shall be paid to possible body deformations when
capacitors are use in high humidity environments.
high temperature or in particular ambient conditions (this must be carefully evaluated upon special testing needs).
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C7- Vibrations and mechanical shocks
Capacitor xing method is very important to minimize detrimental eects due to vibrations or mechanical shocks.
In particular, when foreseen application will submit capacitors to mechanical stresses, axial leaded capacitors shall be adequately xed to
capacitors having lug terminals should be positioned in order to guarantee additional body support against vibrations, shocks and mechanical
stresses, (elastic silicon gluing, xing bands etc.).
The above is particularly important for units having big size and weight.
The mere lugs connection may not be enough to withstand relevant mechanical stresses or vibrations.
Axial capacitors should have the body resting onto the PCB surface.
The vertical mounting of axial capacitors (resting on one head) should be avoided, adopted just in case of no alternative possibilities and taking in
consideration the eects on mechanical stresses and vibration withstanding. Axial units vertical mounting need must be communicated to ICEL
S.r.l. in order to adopt execution features preventing potentially problematic mounting and soldering to PCB.
Radial in box capacitors must rest onto PCBs surface (capacitor mounted on PCB with the box supporting area in contact with PCB surface). If not
dierently declared or stated by normative taken as a reference in series specications, the vibrations withstanding for radial in box capacitors is
in accordance with IEC 60068-2-6 (test Fc, sinusoidal vibration):
f = 10÷500Hz for leads pitch P ≤ 22.5mm
f = 10÷55Hz for leads pitch P > 22.5mm
3 x 2 hours with 0.75mm amplitude (below 57.6Hz) or 98m/s2 (above 57.6Hz), applied in three orthogonal axis No visible damage, no open or
short circuit admitted.
Do not exceed the tested ability to withstand mechanical stresses and vibrations. Anyway, in case of possible particularly stressing vibration
or mechanical shocks operating conditions, an adequate test and behavior evaluation under real working conditions must be made.
C8- Connections
The current carrier contacts into the capacitors (especially when they are high section lugs, blades and so on) can dissipate heat from the unit but
they may also transfer heat generated in outer connections into the capacitor.
For this reason, it is necessary to keep the connections leading to the capacitors cooler than the capacitor itself. Important: special care is necessary
when designing circuits with capacitors connected in parallel or in series.
In parallel connections, the current splitting depends on slight dierences of resistances and inductances in the current paths, then one
of the capacitors may be easily overloaded. Moreover, when one capacitor fails by short-circuit or simply self-heal, the complete energy of the
bank will be rapidly dissipated at the breakdown - clearing point with possible destruction of the unit; the global voltage withstanding capability
of a bank of several capacitors connected in parallel is typically (slightly) lower than the performance of a single unit. For this reason, wider safety
margins compared to the operating condition shall be considered, and with such layouts, the segmented executions versions should be taken in
consideration.
In series connections, because of variations in the circulation resistances of units, the correct voltage division between capacitors should be
ensured by resistive voltage dividers. The insulation voltage of the single units shall be appropriate for the series arrangement. The above must be
taken in consideration when submitting equipment to over-voltage or over-load tests and evaluating potential equipment malfunctions or failure
modes and conditions.
The modication of the original lug (and “rigid” in general) terminals shape and geometry to x capacitors on the circuit is not admitted.
PCBs and
C9- Across the line and interference suppression applications (class X and Y caps.)
This type of capacitors is permanently submitted to mains voltage and additional surge or high pulse stress typical of this kind of application. The
capacitor must have a high safety margin and must be approved in conformity with related reference standards (EN134200, IEC60384-14 etc.).
Do not use capacitors not approved in interference suppressors applications.
For safety reasons, the use of approved components in conformity with the above mentioned standards is mandatory. In case of across the line
application with pulses or anomalous spikes the use of additional surge suppressors in parallel to the capacitor is strongly suggested.
C10- Special working conditions
Following special working conditions must be carefully evaluated before using a capacitor in the application:
- humid ambient: a capacitor operating in moist ambient might absorb humidity. The humidity may enter from the leads-sealing and/or box-
sealing contact surfaces and gradually reaches the winding. This can cause gradual electrodes oxidation leading in medium - long term to the
capacitor damage or failure. Humidity can cause also electrochemical corrosion, depending on capacitors design and materials, destroying the
metallization leading to capacitance drop, overheating, swelling of the capacitors body and potentially ending up to short circuit and relevant
damage up to explosion and burning.
The potential related ageing eect due to electrochemical corrosion strongly depends on the amplitude of the applied voltage.
Capacitors eventually modify their characteristics according to environmental conditions. The magnitude and speed of these modications
depend on dielectric, design and protecting material.
With special design and insulation materials the speed of this process can be slowed, but not completely eliminated.
Moreover, a certain capacitance variation takes place as a consequence of air humidity.
The combination of high operation temperature and high humidity levels, even more with AC voltage operation and with high energy density
design, is a particularly dangerous and critical condition, potentially causing a fast ageing of the capacitor (re.: DIN40040 temperature-humidity
graphs), with related relevant main parameters variations, body distortion, decrease of the expected life and rapid increase of the failure
probability. This should be taken in account, in particular if units are supposed to be used in tropical countries or at critical environmental and
climatic conditions.
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Temperature and Humidity Operating Reference
Important: special attention shall be paid when choosing capacitors to harsh environmental and climatic conditions. For this kind of application,
special execution capacitors having THB ratings shall be designed and adopted (THB: Temperature Humidity Biased).
List of tests potentially adoptable to evaluate high humidity - temperature performances for harsh environment.
Please refer to each type specification for the actually adoptable ones
Test conditions
Test ID
a
b
c
d
e
f
g
Damp heat test (steady state) not biased - IEC60068
Damp heat test (steady state) biased - AEC Q-200 cockpit
Robustness under high humidity, Grade II - IEC 60384-17:2019
High robustness under high humidity, Grade III - IEC 60384-17:2019
Damp heat test (steady state) biased - 70/70/1000
Humidity load test, Test Cy, Severity II - IEC 60068-2-67
Humidity load test, Test Cy, Severity III - IEC 60068-2-67 and
Always refer to type specication for admitted tests type and severity level. The component tests upon not admitted ratings and severity levels,
lead to unpredictable damages and results.
Note: testing capacitors upon most severe test classes, a typical eect could be the box bulging, even if with electrical parameter still within
admitted variations and not corresponding to real electrical damages (please refer to type specications).
Always refer to type specications for suitable usage allowed and possible application under harsh environment conditions.
Working Voltage (Uw/Ur)
85/85/1000 Level 1 - AEC Q-200
midity
Test duration
Voltage applied (DC or AC
upon type specification)
Temperature
Relative hu
No voltage applied+40 ±2°C93 ±2%56 days (1344h)
Rated voltage (Ur)+40 ±2°C93 ±2%1000h
Rated voltage (Ur)+40 ±2°C93 ±2%56 days (1344h)
Rated voltage (Ur)+60 ±2°C93 ±2%56 days (1344h)
Rated voltage (Ur)+70 ±2°C70 ±2%1000h
Rated voltage (Ur)+85 ±2°C85 ±2%21 days (504h)
Rated voltage (or de-rat-
ed voltage, as indicated
+85 ±2°C85 ±2%1000h
at type specication)
120
[°C]
op
100
80
60
Operative Temperature, T
40
20
0
0102030405060708090
Harsh
Standard condition
environment
condition
Special environment
test condition
Relative Humidity, RH [%]
- sealing resins: chemical and thermal eects due to capacitors embedding in resins and curing process must be taken in account. Solvents
contained in the resin might cause capacitor characteristics deterioration and physical damage to protection materials. The heat generated in
the resin mass during polymerization process may bring to high temperatures and the resin shrinking during hardening may also cause leads
breaks or other physical damage of the capacitor.
- immersion in oils-liquids: oils or other insulating-protecting liquids may cause the damage of the capacitors protecting materials and or
units destruction. In particular, they may attack the tape adhesive, causing the rapid flagging and de-touch of the insulating tape from the
axial capacitors body. Depending on the substances, a possible relevant and fast penetration inside the capacitors may take place, typically at
terminals-sealing contact and at sealing-case or tape contact surfaces. In general, immersion in any kind of liquids is not admitted: any need of
immersion of the units in oils or other kind of insulating-protecting liquids must be communicated to ICEL S.r.l. for preventive evaluation. In any
case, enough long time and exhaustive evaluation tests shall be performed.
- adhesive curing: the resin used to glue SMD components might cause damage to capacitors dielectric (in particular to polypropylene lm) if they
are cured in the same oven, especially when long curing time is combined with the heat necessary for the curing process. When polypropylene
capacitors are used with SMD components, they must be t after the SMD gluing process.
- rapid mould growth, corrosive atmosphere and ambient with a high degree of pollution (also a very long permanence at stock before usage if not
at controlled conditions): carefully evaluate operating conditions which may cause capacitors damage or accelerated aging. Very long term
permanence at stock before usage may cause oxidation or other chemical phenomena taking place on the terminals surface, in particular in
ambient having high humidity levels, relevant temperature oscillations or presence of contaminating or reacting chemical substances. Unusual
storage or transport temperatures or conditions may cause damages too.
- dust in the cooling air: particularly if conductive.
- operating altitude: capacitors used at big altitudes are subjected to special operating conditions, in particular they are submitted to reduced
heat dissipation efciency related to the air density and characteristics variation.
The maximum allowable altitude above sea level is typically 2200 meters, 1000 meters for capacitors for power applications.
- following further unusual service conditions and misapplications may cause failures: superimposed radiofrequency voltages (units not
suitable for radio interference suppression), unusual vibrations, bumps of mechanical shocks, abrasive particles, corrosive substances, explosive
or conducting dust in cooling air and oil or water vapors, explosive gas or substances, radioactivity, rapid or excessive humidity or temperature
changes of working ambient, unusual transportation or storage temperature and environmental conditions.
Unless dierently specied, ICEL S.r.l. products are protected with flame retardant materials.
Please refer to the series specications for detailed information.
ICEL S.r.l. products are manufactured in compliance with RoHS and REACH normative requirements, Conflicts Free Materials regulation.
Related statements, data and additional information are available at the web site www.icel.it.
C12-Safety warnings for capacitors usage in power equipment
A deep and detailed study of the suitability of the capacitors for the application and their correct usage in the equipment is extremely important.
Adequate qualication and reliability tests made on an enough high number of samples for an enough long time are necessary as well.
A discussion of the operating conditions and the evaluation of tests results shall be made in cooperation with ICEL Technical Oce.
Since potential consequences of malfunctions, problems or failures upon power applications may be extremely serious, the equipment must be
designed with adequate safety systems for detection, monitoring and problems prevention, devices for main electric parameters monitoring,
temperature sensors, smoke – re sensors etc.
As soon as an anomalous behavior of the system appears, the circuit supply prompt stop shall take place to prevent the progression to irreversible
capacitors damage levels.
The equipment design and circuit layout shall be made in order to contain and minimize the possible eect of a failure, avoiding damage
propagation to surrounding areas.
Important: a wide safety margin of capacitors ratings compared to the operating conditions must be kept (25-30% suggested).
Periodic checking plans of the equipment state and components conditions shall be adopted, including replacement plans for ageing prevention.
D-Storage conditions and Standard environmental conditions
In order to minimize the units ageing and electrical parameters variation before the units real use in the application, it is suggested to avoid
capacitors storage where environmental conditions are dierent from the following (standard environmental conditions):
- Temperature: +15°C ÷ +35°C (ideal), up to +5°C ÷ +50°C admitted.
- Humidity (+25°C): average per year ≤ 60%, 30 days random distributed throughout the year ≤ 80%, other days ≤ 70%, dew not admitted.
These humidity levels should be reduced at ambient temperatures ≥ +25°C, of about 15% for every 5°C of ambient temperature increase,
up to +50°C max.
Important: very long term storage may be related to surface oxidation phenomena or other chemical reactions on the copper exposed parts of the
terminals (cutted sections); very long term storage, particularly in presence of humidity, may also reduce the terminals solderability.
Moreover,service life must be considered as the sum of operating hours, operating breaks, storage and testing time at users - customers
facility and transport times.
E-Printing and production date code; resistance to solvents
If not otherwise stated by reference normative, by approvals related to capacitors series or agreed with customers, the typical printing data shown
on capacitor body are:
- ICEL trade mark or name
- Series or type
- Rated capacitance and measuring unit
- Tolerance on capacitance (shown in % or with correspondent letter code)
- Rated voltage
- Manufacturing date codes according to DIN41314 and IEC60062 + 2 characters corresponding to the week code (total 4 characters):
Example: capacitors manufactured 20 February 2015 code= F208; capacitors manufactured 8 October 2017 code= JO41.
If necessary, special production data code printing may be used or adopted upon request in order to ensure an extra-detailed products traceability;
for example, if several repeated productions and shipments are made in the same week the std. code could be followed by a further character,
obtaining a 5 characters code. Other special identication codes could be managed, upon agreement.
In addition to above listed data, following additional printing are typically shown on approved series:
- Operating temperature range or climatic class
- Self-healing property
- Protection class
- Expected life class
- Operating frequency
- Approval references and approval Marks
Some of the above mentioned data may be lacking when capacitors shape, dimensions or available printing surfaces do not
complete data marking.
Printing resistance to solvents (laser printing excluded): the printing is usually made on capacitors body with dark ink, resistant to the main
common solvents (like alcohol, fluorhydro-carbons and their mixtures) used for PCBs washing and flux residues removal.
Particularly aggressive solvents and cleaning agents based on chloroydro-carbons or ketones must not be used since they may damage the
capacitors and their coating materials.
In particular, any substance containing ketones will probably cause printing melting.
Moreover, also some kind of protecting and tropicalizing varnishes having the same chemical base may cause printing melting and potential
capacitors damage.
Important: before applying any varnish or protecting liquid or solvent onto capacitors surface, do test its eect on markings and coating materials.
It is recommended to carefully dry the components after the cleaning.
F-General Warning (general rules and indications for problems and failures management or rejections)
Not respecting specications and parameters limits, improper installation, use or application of ICEL S.r.l. products might cause damage to the
components, induce their characteristics modication and a decrease of their reliability and expected life.
This could bring to dangerous failures which may cause the destruction of the components and of the equipment where they are used, smoke,
re and explosion danger.
Note that the adoption of segmented metallized lm design does not directly imply that the capacitors are not subjected to potentially
dangerous failures.
Before using ICEL S.r.l. products in any application, please read carefully the related specications and all the information included in this catalogue.
Information and data contained in the chapter “General technical information”, must be considered as a completing part of the single series
specications.
Overstressing and overheating shorten the life of a capacitor, therefore the operating conditions (like temperature, voltage, installation, operation
and so on) should be strictly controlled.
Be sure that the component is proper for your application, that the application parameters do not overcome the limits stated at related specication
and that all the warnings and instructions for use are correctly followed.
Do check in the intended application and operating conditions of the component before using it in any product or equipment, to ensure that the
component is proper for your application.
In case of doubt about service conditions and correspondent capacitors characteristics and performances, or in case of application notor working parameters not stated at capacitors specications, ICEL Technical Oce must be consulted (please refer to the “Application data
questionnaire”; paragraph H).
ICEL S.r.l. is not responsible for problems caused by critical usage and application, not preventively discussed and acknowledged by
ICEL Technical Oce.
Products manufactured by ICEL S.r.l. are made with maximum attention to quality, in order to be free from defects in design, materials and
workmanship, following related series specications and applicable national and international normative, regulations and approvals obtained
requirements.
The cooperation between ICEL S.r.l. and customers is fundamental to solve possible problem, prevent and reduce the consequences of failures.
In particular, the prompt and exhaustive communication at least of following main information is necessary to allow a quick and eective
response to the complaints you may have:
- detailed description of the failure - problem
- when and how the failure - problem was detected
- operating conditions, environmental conditions and application description
- operating time before the failure - problem occurred
- number of damaged and their percentage on total quantity used or supplied
- original supplied lots data and references (production date code, delivery date, quantity etc.)
- rst time usage in a new application or long term, consolidated application (other lots previously supplied?)
- problems detected during tests (which one? Under which conditions?) or controls or during normal working on eld
- any additional information about special conditions which may have been associated with the failure - problem occurred
- possible similar problems occurred in the same application- conditions on other capacitors types (or from competitors)
A fundamental aim of the ICEL S.r.l. Quality Assurance system is the prevention of defects occurring.
allow a
foreseen
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General technical information
ICEL S.r.l. is not responsible for possible delays in the Non-Conformities management in absence of prompt, complete and detailed
information provided by the customer.
Samples of damaged, if available, should be sent to ICEL S.r.l. for analysis upon agreement and indications from ICEL S.r.l.
They must be clearly identied and possibly separated by other “good” units or units damaged for other reasons.
They must be adequately packed and protected to prevent any additional damage than the one claimed.
Important: the customer is required to have an adequate and eective traceability system to keep nite and focused the problem
management (and related costs) on involved pieces or lots only.
ICEL S.r.l. is not responsible for any additional cost or undue management need related to a not precise and not reliable customer
traceability and products identication system.
ICEL S.r.l. liability shall be limited to replacement or repair free of charge of the ascertained defectives, provided that notication of failures or
defects is given to ICEL S.r.l. immediately when the same becomes apparent.
These actions are possible only after that the returning conditions have been agreed with the customer or buyer and ICEL S.r.l. has analyzed the
defectives and authorized the returning of goods.
Any components rejection of samples delivery must be packed and adequately protected in order to prevent any additional damage dierent
from the originally detected failure or problem, anyway ensuring the material integrity and protection against environmental conditions.
ICEL S.r.l. is not responsible for any possible damages to persons or things, of any kind, derived from improper installation, wrong usage or incorrect
application of ICEL S.r.l. products.
ICEL S.r.l. shall not be liable for any defect which is due to accident, fair wear and tear, negligent use, tampering, improper handling, improper use,
operation or storage or any other default on the parts of any person other than ICEL S.r.l.
In case of defective goods, ICEL S.r.l. shall not be liable, under no circumstances, for any consequential loss or damage arising from the goods sold.
above limitations to ICEL S.r.l. liability for defective goods apply also to product liability: ICEL S.r.l. shall have no responsibility for injury to persons or
damage to goods or property of any kind.
In case of any product liability claim from third parties against ICEL S.r.l., not falling within ICEL S.r.l. liability in accordance with above statements,
customer or buyer shall hold ICEL S.r.l. harmless.
G-Updating and validity of product specications - General data and information
All drawings, descriptions, characteristics, materials and performance data given by ICEL S.r.l. are as accurate as possible but must be considered
as a general information, so they are not binding on ICEL S.r.l., unless specically agreed in writing.
Unless otherwise stated, dimensions and materials may be subjected to reasonable variations due to available raw materials or normal
manufacturing process tolerances.
The caracteristics of the components are subjected to improvements and upgradings related to norms evolutions and the continuous improvement
approach adopted. The production lot code identies a specic period and the related compliance with the applicable specications reference.
The
The data and information given in the General Technical Information chapter must be considered a part of the
single types and capacitors families specications contained in the general catalogue.
Data and characteristics shown in this catalogue are subjected to modications without notice.
Always refer to ICEL S.r.l. web site, www.icel.it, for products updated characteristics, last revision specications,
general data and information, products certications and news.
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General technical information
H-Application Data Questionnaire
In order to help ICEL Technical Oce to correctly individuate the component suitable for your needs, please ll this questionnaire, giving us all the
available information about the application and the working conditions.
Capacitance (1kHz): Tolerance (%):
Resistor value (Ω, for RC networks only): Resistor power (W, for RC networks only):
Rated DC voltage (Vdc): Operating DC voltage (Vdc):
Rated AC voltage (Vac): Operating AC voltage (Vac):
Repetitive Peak voltage (Vdc): Non Repetitive Peak voltage (Vdc):
Operating frequency (Hz):
Irms max.(A): , at frequency= Hz, at temperature= °C
Max. Pulse Rise Time (V/μs) : Max. Repetitive Peak Current (A):
Max. Non Repetitive Peak Current (A):
Pulse width (s): Pulse repetition frequency (Hz):
Max. Dissipation Factor (x10-4): tgd= at frequency= Hz; tgd= at frequency= Hz
Max. E.S.R.( mΩ): at frequency= Hz; at frequency= Hz
Insulation Resistance at+25°C (MΩ): after 1 minute at Vdc
Operation: continuous D Intermittent D with Cycle duration / Duty cycle:
Test voltage between leads: Vdc D / Vac D, for s, notes:
Test voltage between leads and case: Vdc D / Vac D, for s, notes:
Max. rated operating temperature (°C): Min. rated operating temperature (°C):
Max. ambient temperature (°C): Min. ambient temperature (°C):
Cooling: natural D; forced D, notes:
Climatic category (IEC60068-1 cold test / heat test / damp heat duration): / /
Ambient operating humidity conditions:
Other critical operating conditions:
Expected life (h): Failure rate (x10-9 component hours):
Reference conditions: voltage applied= ; temperature= ; others=
Failure modes:
Preferred execution: axial cylindrical
Notes:
Diameter (mm): , tolerance± mm Thickness (mm): , tolerance± mm
Height (mm): , tolerance± mm Length (mm): , tolerance± mm
Leads type: Leads dim. (mm): , tolerance± mm
Printing requirements:
Approvals:
Reference Normatives:
Packing requirements:
Reference / presently used components:
Additional technical information (please enclose drawings, schematic circuit diagram, voltage and current waveforms and application
description if available):
Needed quantity: Foreseen order frequency:
Delivery terms: Target price:
Notes:
List of enclosed documents:
, axial flat , radial dipped , radial in box , radial with lugs , other
I - Capacitors selection guide (Main Applications and Products destination)
PLEASE REFER TO ICEL S.R.L. WEB SITE WWW.ICEL.IT FOR PREFERREND USAGE AND SUITABILITY UPON APPLICATIONS.
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s.r.l.
21053 CASTELLANZA (VA)
VIA CARLO JUCKER, 16
Sede legale:
21053 CASTELLANZA (VA)
VIA SALVO D'ACQUISTO, 15
Tel. +39-0331-500.510
Fax +39-0331-503.035
E-mail icel@icel.it
http://www.icel.it
INDUSTRIA COMPONENTI ELETTRONICI
MECCANOGRAFICO VA010069
Cod. Fiscale N. IT 00218230126
Partita I.V.A. N. IT 00218230126
R.E.A. n. 111635
C.C.P. n. 19864214
Registro imprese: 7492 VA026
Capitale € 51.480 int. vers.
14/12/2018 – Rev.0
General Conditions and Terms of Sale
Please refere to the following General Conditions and Terms of Sale, completing and being part of the order confirmation.
Since we can accept your order and make a legally enforceable agreement without further reference to you, you must read
these terms and conditions to make sure that they contain all that you want and accept and nothing that you are not happy
with. If you need clarifications, please contact us at +39 0331 500510 or at icel@icel.it.
This document contains the General Conditions and Terms of Sale ruling buying and selling between the companies: (the
Seller) and its Customers (the Buyers), applicable to any type of product or service.
Order: list of products and services requested and any special conditions governing the relationship.
Order confirmation: our official acceptance of the customer order, including reference to the present document.
General Conditions and Terms of Sale: these apply to all Supplies. They form an integral and substantial part of each offer and
order acknowledgement.
1. General
1.1. These General Conditions and Terms of Sale are applicable together with the conditions included in our order
confirmation. In case of contradiction what indicated in the order confirmation will prevail.
1.2. The supply is subordinate to acceptance of the present document “GENERAL CONDITIONS AND TERMS OF SALE”.
Application of these General Conditions and Terms of Sale by the Seller is included and valid for all order
acknowledgements sent to its customers.
1.3. Acceptance, either express or tacit, constitutes the Buyer’s waiver of the application of its own general and special
Terms and Conditions of Purchase. Any condition in the Order that modifies, conflicts with or contradicts these
General Conditions and Terms of Sale will be considered invalidated and not applicable, unless specified otherwise
herein. The Seller will not accept any verbal agreements or commitments stipulated by its representatives and/or
agents in contraddiction with the present document; any divergence from these terms and conditions must be
agreed with the Seller (ICEL S.r.l.) and made in writing.
1.4. The Seller reserves the right, at its sole discretion, to modify these General Conditions and Terms of Sale at any time,
but it is required to inform the Customer thereof. The order is an irrevocable proposal to buy, but it is deemed
accepted by the Seller only following official order confirmation or execution of the order.
1.5. Any reference made to trade terms (such as EXW, CIP, etc.) is deemed to be made to Incoterms published by the
International Chamber of Commerce and current at the date of conclusion of the contract.
Page 35
Pag.2
2. Characteristics of the Products – Modifications
2.1. Any information or data relating to technical features and/or specifications of the Products contained in dépliants,
price lists, catalogues and similar documents shall be binding only to the extent they are expressly referred to in the
Contract.
2.2. The Seller may make any change to the Products which, without affecting the specifications, appear to be necessary
or suitable, without need of notice to customers.
3. Rescheduling – Order cancellation
3.1. The purchase order cancellation could be made by the Buyer no later than 6 weeks before scheduled delivery date
by written notice, without prejudice to compensation of the duly documented costs incurred by the Seller in
executing the Order. Upon receipt of the request to cancel the Order, the Seller must suspend all activities relating
to such Order and take all steps to minimize the costs and losses resulting from cancellation.
4. Delivery Time
4.1. If the Seller expects that he will be unable to deliver the Products at the date agreed for delivery, he must inform the
Buyer of such occurrence within the shortest delay, in writing o by phone. The Seller must also communicating the
estimated new date of delivery. If the delay for which the Seller is responsible lasts more than 8 weeks, the Buyer
will be entitled to terminate the Contract, with reference to the Products the delivery of which is delayed only, by
giving a written, 10 days notice to the Seller.
4.2. Any delay caused by force majeure (as defined in art. 10) or by acts or omissions of the Buyer (e.g. the lack of
indications which are necessary for the supply of the Products), shall not be considered as a delay for which the
Seller is responsible.
5. Delivery and shipment – Complaints
5.1. Except as otherwise agreed, the supply of the goods will be Ex Works, even if it is agreed that the Seller will take
care, in whole or in part, of the shipment. Any kind of assurance on the shipped goods shall be asked directly by the
Buyer
5.2. In any case, whatever the delivery term agreed between the parties, the risks will pass to the Buyer, at the latest,
upon delivery of the goods to the first carrier.
5.3. Any complaints relating to packing, quantity or exterior features of the Products (apparent defects), must be
notified to the Seller, by registered letter with return receipt, within 6 months from receipt of the Products; failing
such notification the Purchaser's right to claim the above defects will be forfeited. Any complaints relating to
defects which could not be discovered on the basis of a careful inspection upon receipt (hidden defects) shall be
notified to the Seller, by registered letter with return receipt, within 7 days from discovery of the defects and in any
case not later than 6 months from delivery; failing such notification the Purchaser's right to claim the above defects
will be forfeited. It’s also understood that minor qualities, colors, dimensions and quantities deviations within
tolerances and normal fluctuations do not give cause for objections.
5.4. It is agreed that any complaints or objections do not entitle the Buyer to suspend or to delay payment of the
Products as well as payment of any other supplies.
5.5. Seller has the right to invoice to the buyer up to ±10% of the quantity ordered by the Buyer.
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6. Prices
6.1. Unless otherwise agreed, prices are to be considered in EURO / unit measure, taxes excluded, Ex Works, for
Products packed according to the usages of the trade with respect to the agreed transport means. It is agreed that
any other cost or charge shall be for the account of the Buyer.
7. Payment conditions
7.1. If the parties did not specified the payment conditions, payment must be made as indicated under article
hereunder.
7.2. If the parties have agreed on payment on open account, payment must be made, unless specified otherwise, in
advance before the shipment, by bank transfer. Payment is deemed to be made when the respective sum is at the
Seller's disposal at its bank. If it is agreed that payment must be backed by a bank guarantee, the Buyer must put at
the Seller's disposal, at least 30 days before the date of delivery, a first demand bank guarantee, issued in
accordance with the ICC Uniform Rules for Demand Guarantees by a primary Italian bank and payable against on
simple declaration by the Seller that he has not received payment within the agreed term.
7.3. If the parties have agreed on payment in advance, without further indication, it will be assumed that such advance
payment refers to the full price. Unless otherwise agreed, the advanced payment must be credited to the Seller's
account at least 15 days before the agreed date of delivery.
7.4. If the parties have agreed on payment by documentary credit, the Buyer must, unless otherwise agreed, take the
necessary steps in order to have an irrevocable documentary credit, to be issued in accordance with the ICC
Uniform Customs and Practice for Documentary Credits (Publication n. 500), notified to the Seller at least 30 days
before the agreed date of delivery. Unless otherwise agreed, the documentary credit shall be confirmed by an
Italian bank agreeable to the Seller and will be payable for sight.
7.5. If the parties have agreed on payment against documents (documentary collection) payment will be, unless
otherwise agreed, Documents Against Payment.
7.6. Unless otherwise agreed, any expenses or bank commissions due with respect to the payment shall be for the
Buyer's account.
8. Warranty and liabilities for defects
8.1. The Products shall be covered by Seller’s standard warranty and liabilities terms and provisions included in the web
site www.icel.it
8.2. Seller warrants that goods sold to the Buyer are conform to Seller’s standard specifications for such Products or such
other specification as are expressly agreed by the Seller and Buyer in writing. It’ s also understood that information
and data contained in the section “General Technical Information” of the catalogues must be considered as a
completing part of each family type of Product. Before using a Seller Products in any application, please read
carefully the related specifications included in the catalogues. An improper installation or not respecting
parameters limits and ratings might cause damage to the products, their characteristics modification and a
decrease of their reliability and useful life. Products manufactured by Seller are made with maximum care, in order
to result free of defects in design, materials and workmanship, according with adequate specifications.
8.3. Cooperation between Buyer and Seller is basically precious in order to solve problems or when a failure occurs. In
case of Buyer complaint, please forward the following information along with an immediate communication of the
failure. Only upon previous agreement with Seller, Buyer could send a detailed description of failure, indicating
operative condition and type of application, number of defective pieces used on field or tested, eventually
expressed in percent on whole quantity used, failure mode and description. It is mandatory the communication of
the original batch of goods as printed on the Product or labeled on packing; please also let us know the delivery
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Pag.4
date and others relevant data from the billing documents. After agreement and upon Seller request, Samples of
defective Products should be sent to Seller for analysis, packed in order to prevent additional damages different
from the ones detected. Data sheets specifications are referred to a fairly large number of products and do not
constitute a guarantee of characteristics or properties in the legal sense. However, agreement on these
specifications does not mean that the Buyer may not claim for replacement of individual defective Products within
the terms of delivery. Seller will not assume any further liability beyond the replacement of defective Products. This
applies in particular to any further consequences of component failure as better specified further in this section. A
single failure among a delivered batch of products should not be meaningful of poor reliability of the whole
production batch, but should be considered as an early failure or understood to have reached incidentally the end
of life within the failure rate defined for each series type.
8.4. The Seller does not warrant that the Products conform to special specifications or technical features or that they are
suitable for particular usages except to the extent such characteristics have been expressly agreed upon in the
Contract or in documents referred to for that purpose in the Contract or specifications.
8.5. All customer applications in which the malfunction or failure of a passive electronic component or a Product could
endanger human life or health (e.g. in accident prevention of life-saving systems), it must therefore be ensured by
means of suitable design of the customer application or other action taken by the customer (e.g. installation of
protective circuity or redundancy) that no injury or damage is sustained by third parties in the event of malfunction
or failure of a passive electronic component. Any warnings, cautions and product specific notes must be observed.
8.6. If claim will be accepted by the Seller and such defects have been timely notified in accordance with art. 5.3, Seller’s
liability shall be limited to only replacement or repairing of goods, free of charge, after acknowledgement of
received notification by customer. Seller is not responsible for any possible damage to persons or things, of any
kind, derived from improper installation, use of application of its products. Seller shall not be liable for any defect
due to accident, fair wear and tear, negligent use, tampering, improper handling and shipment, operation and
storage or any other default on the parts of any person other than Seller.
8.7. To the maximum extent permitted by above statements, in no event shall Seller or its referred dealers be liable for
any damages whatsoever (including without limitation, special, incidental, consequential, or indirect damages for
personal injury, loss of business profits, business interruption or any pecuniary loss) arising out of the use or
inability to use Seller’s products. In the case of any product liability claim from third parties against Seller, not
falling within Seller liability, Customer or Buyer should hold Seller harmless.
8.8. Even in case of certain and agreed Non Conformity, the Seller is not responsible and cannot be required to pay for
any cost related to lacking or not adeguate traceability system of the Customer.
8.9. Please also refer to what indicated about the matter in the “General Warning” present in Seller official web site at
the link http://www.icel.it/wp-content/uploads/2015/09/Generaltechnicalinformation.pdf
8.10. The Seller will evaluate and decide if repairing or replacing the Products which have shown to be defective. The
Products repaired or replaced under the warranty will be submitted to the same guarantee of the standard
products starting from the date of repair or replacement. Before to return shipments the Buyer has to receive the
previous consent by the Seller. Seller will replace goods for which the claim will be accepted only.
9. Retention of title
9.1. It is agreed that, the Products delivered remain the Seller's property until complete payment is received by the
Seller. The reservation of title is extended to the Products sold by the Buyer to third parties and to the price of such
sales, within the maximum limits set forth by the laws of the country of the Buyer which regulate the present
clause.
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Pag.5
10. Force majeure
10.1. Either party shall have the right to suspend performance of his contractual obligations when such performance
becomes impossible or unduly burdensome because of unforeseeable events beyond his control, such as strikes,
boycotts, lock-outs, fires, war (either declared or not), civil war, riots, revolutions, requisitions, embargo, energy
black-out, events involving suppliers causing delivery stop or impossible raw materials delivery for unpredictable
reasons.
10.2. The party wishing to make use of the present clause must promptly communicate in writing to the other party the
occurrence and the end of such force majeure circumstances.
10.3. Should the suspension due to force majeure last more than 8 weeks, either party shall have the right to terminate
the Contract by a 10 days written notice to the counterpart.
11. Jurisdiction – Arbitration
11.1. The competent law courts of the place where the Seller has his registered office shall have exclusive jurisdiction in
any action arising out of or in connection with this contract. However, as an exception to the principle here above,
the Seller is in any case entitled to bring his action before the competent court of the place where the Buyer has his
registered office. Should the Buyer has his seat out of CEE, all dispute arising out of or in connection with the
present General Conditions and Terms of Sale shall be finally settled under the Rules of Arbitration Chamber of
Busto Arsizio by one or more arbitrators appointed in accordance with the said Rules.
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