EPCOS EPC B59008-C70 Datasheet

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PTC thermistors as limit temperature sensors

Leaded disks, coated, miniaturized

Series/Type: B59008

Date: March 2014

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Sensors

Limit temp. sensors, leaded disks, coated, miniaturized C8

Applications

Dimensional drawing

Limit temperature monitoring

Features

Tinned leads Marked with coded sensing temperature Characteristics for sensing temperatures T

= 90 to 160 °C conform with DIN 44081

sense

Extremely fast response due to small dimensions UL approval to UL 1434 (file number E69802) RoHS-compatible

Delivery mode

Bulk (standard)

Dimensions in mm

General technical data

Max. operating voltage (TA= 0 ... 40 °C) V Max. measuring voltage (TA= 25 °C ... T Rated resistance (V

≤ 2.5 V) R

PTC

sense

+23 K) V

Thermal threshold time t Operating temperature range (V ≤ V Operating temperature range (V = V

) T

meas,max

) T

max

meas,max

30 V DC

7.5 V DC ≤ 250 Ω < 3 s 40/ T

sense

+23 °C

0/+40 °C

Electrical specifications and ordering codes

°C

sense

R (T (V

Ω

sense

PTC

 ∆T)

≤ 2.5 V)

R (T (V

Ω

sense

PTC

+ ∆T)

≤ 2.5 V)

R (T (V

Ω

sense

PTC

+ 15 K)

≤ 7.5 V)

R (T (V

Ω

sense

PTC

+ 23 K)

≤ 2.5 V)

Stamp code

Ordering code

∆T = ±5 K

70 ≤ 570 ≥ 570 - ≥ 4 k g B59008C0070A040 80 ≤ 570 ≥ 570 - ≥ 4 k h B59008C0080A040

90 ≤ 550 ≥ 1330 ≥ 4 k - i B59008C0090A040 100 ≤ 550 ≥ 1330 ≥ 4 k - j B59008C0100A040 110 ≤ 550 ≥ 1330 ≥ 4 k - k B59008C0110A040 120 ≤ 550 ≥ 1330 ≥ 4 k - l B59008C0120A040 130 ≤ 550 ≥ 1330 ≥ 4 k - m B59008C0130A040 140 ≤ 550 ≥ 1330 ≥ 4 k - n B59008C0140A040 150 ≤ 550 ≥ 1330 ≥ 4 k - p B59008C0150A040 160 ≤ 550 ≥ 1330 ≥ 4 k - s B59008C0160A040

Important notes at the end of this document.

Page 2 of 9Please read Cautions and warnings and

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Sensors

Limit temp. sensors, leaded disks, coated, miniaturized C8

Reliability data

Test Standard Test conditions ∆R25/R Electrical endurance,

constant Damp heat IEC 60738-1 Temperature of air: 40 °C

IEC 60738-1 Storage at V

Test duration: 1000 h

max/Top,max(Vmax

)

< 25%

< 10% Relative humidity of air: 93% Duration: 56 days Test according to IEC 60068-2-78

Rapid change of temperature

IEC 60738-1 T1= T

Number of cycles: 5

(0 V), T2= T

op,min

op,max

(0 V)

< 25%

Test duration: 30 min Test according to IEC 60068-2-14, test Na

Vibration IEC 60738-1 Frequency range: 10 to 55 Hz

< 5% Displacement amplitude: 0.75 mm Test duration: 3 × 2 h Test according to IEC 60068-2-6, test Fc



Important notes at the end of this document.

Page 3 of 9Please read Cautions and warnings and

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Sensors

Limit temp. sensors, leaded disks, coated, miniaturized C8

Characteristics (typical)

PTC resistance R

versus PTC temperature

PTC

TPTC (measured at low signal voltage)

Important notes at the end of this document.

Page 4 of 9Please read Cautions and warnings and

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Sensors

Limit temp. sensors, leaded disks, coated, miniaturized C8

Cautions and warnings

General

EPCOS thermistors are designed for specific applications and should not be used for purposes not identified in our specifications, application notes and data books unless otherwise agreed with EPCOS during the design-in-phase. Ensure suitability of thermistor through reliability testing during the design-in phase. The thermistors should be evaluated taking into consideration worst-case conditions.

Storage

Store thermistors only in original packaging. Do not open the package before storage. Storage conditions in original packaging: storage temperature 25 °C ... +45 °C, relative humidity ≤75% annual mean, maximum 95%, dew precipitation is inadmissible. Avoid contamination of thermistors surface during storage, handling and processing. Avoid storage of thermistor in harmful environment with effect on function on long-term operation (examples given under operation precautions). Use thermistor within the following period after delivery:



Through-hole devices (housed and leaded PTCs): 24 months



Motor protection sensors, glass-encapsulated sensors and probe assemblies: 24 months



Telecom pair and quattro protectors (TPP, TQP): 24 months



Leadless PTC thermistors for pressure contacting: 12 months



Leadless PTC thermistors for soldering: 6 months



SMDs in EIA sizes 3225 and 4032, and for PTCs with metal tags: 24 months



SMDs in EIA sizes 0402, 0603, 0805 and 1210: 12 months

Handling

PTCs must not be dropped. Chip-offs must not be caused during handling of PTCs. Components must not be touched with bare hands. Gloves are recommended. Avoid contamination of thermistor surface during handling.

Soldering (where applicable)

Use rosin-type flux or non-activated flux. Insufficient preheating may cause ceramic cracks. Rapid cooling by dipping in solvent is not recommended. Complete removal of flux is recommended. Standard PTC heaters are not suitable for soldering.

Important notes at the end of this document.

Page 5 of 9Please read Cautions and warnings and

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Sensors

Limit temp. sensors, leaded disks, coated, miniaturized C8

Mounting

Electrode must not be scratched before/during/after the mounting process. Contacts and housing used for assembly with thermistor have to be clean before mounting. Especially grease or oil must be removed. When PTC thermistors are encapsulated with sealing material, the precautions given in chapter "Mounting instructions", "Sealing and potting" must be observed. When the thermistor is mounted, there must not be any foreign body between the electrode of the thermistor and the clamping contact. The minimum force of the clamping contacts pressing against the PTC must be 10 N. During operation, the thermistor’s surface temperature can be very high. Ensure that adjacent components are placed at a sufficient distance from the thermistor to allow for proper cooling at the thermistors. Ensure that adjacent materials are designed for operation at temperatures comparable to the surface temperature of thermistor. Be sure that surrounding parts and materials can withstand this temperature. Avoid contamination of thermistor surface during processing.

Operation

Use thermistors only within the specified temperature operating range. Use thermistors only within the specified voltage and current ranges. Environmental conditions must not harm the thermistors. Use thermistors only in normal atmospheric conditions. Avoid use in deoxidizing gases (chlorine gas, hydrogen sulfide gas, ammonia gas, sulfuric acid gas etc), corrosive agents, humid or salty conditions. Contact with any liquids and solvents should be prevented. Be sure to provide an appropriate fail-safe function to prevent secondary product damage caused by abnormal function (e.g. use VDR for limitation of overvoltage condition).

This listing does not claim to be complete, but merely reflects the experience of EPCOS AG.

Important notes at the end of this document.

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Sensors

Limit temp. sensors, leaded disks, coated, miniaturized C8

Symbols and terms

Symbol Term A Area C Capacitance C

Heat capacity f Frequency I Current I I I I I I I I I I

max

res

PTC

r,oil

r,air

RMS

Smax

Maximum current

Rated current

Residual current

PTC current

Residual currrent

Residual currrent in oil (for level sensors)

Residual currrent in air (for level sensors)

Root-mean-square value of current

Switching current

Maximum switching current LCT Lower category temperature N Number (integer) N

Operating cycles at V

Switching cycles at V

, charging of capacitor

max

, failure mode

max

P Power P

diss

min

∆R R

PTC

ref

25,match

∆R

Maximum power at 25 °C

Electrical power

Dissipation power

Generator internal resistance

Minimum resistance

Rated resistance

Tolerance of R

Parallel resistance

PTC resistance

Reference resistance

Series resistance

Resistance at 25 °C

Resistance matching per reel/ packing unit at 25 °C

Tolerance of R

T Temperature t Time T

Ambient temperature

Important notes at the end of this document.

Page 7 of 9Please read Cautions and warnings and

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Sensors

Limit temp. sensors, leaded disks, coated, miniaturized C8

sense

PTC

ref

Rmin

surf

Thermal threshold time

Ferroelectric Curie temperature

Settling time (for level sensors)

Rated temperature

Sensing temperature

Operating temperature

PTC temperature

Response time

Reference temperature

Temperature at minimum resistance

Switching time

Surface temperature UCT Upper category temperature V or V V

c(max)

F,max

RMS

ins

link,max

max

max,dyn

meas

meas,max

PTC

Voltage (with subscript only for distinction from volume)

Maximum DC charge voltage of the surge generator

Maximum voltage applied at fault conditions in protection mode

Root-mean-square value of voltage

Breakdown voltage

Insulation test voltage

Maximum link voltage

Maximum operating voltage

Maximum dynamic (short-time) operating voltage

Measuring voltage

Maximum measuring voltage

Rated voltage

Voltage drop across a PTC thermistor

α Temperature coefficient ∆ Tolerance, change δ

Dissipation factor

Thermal cooling time constant λ Failure rate

Lead spacing (in mm)

Abbreviations / Notes

Surface-mount devices

* To be replaced by a number in ordering codes, type designations etc. + To be replaced by a letter

All dimensions are given in mm. The commas used in numerical values denote decimal points.

Important notes at the end of this document.

Page 8 of 9Please read Cautions and warnings and

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Important notes

The following applies to all products named in this publication:

1. Some parts of this publication contain statements about the suitability of our products for

certain areas of application. These statements are based on our knowledge of typical re-

quirements that are often placed on our products in the areas of application concerned. We nevertheless expressly point out that such statements cannot be regarded as binding statements about the suitability of our products for a particular customer application. As a rule, EPCOS is either unfamiliar with individual customer applications or less familiar with them than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to check and decide whether an EPCOS product with the properties described in the product specification is suitable for use in a particular customer application.

2. We also point out that in individual cases, a malfunction of electronic components or

failure before the end of their usual service life cannot be completely ruled out in the current state of the art, even if they are operated as specified. In customer applications

requiring a very high level of operational safety and especially in customer applications in which the malfunction or failure of an electronic component could endanger human life or health (e.g. in accident prevention or lifesaving 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 circuitry or redundancy) that no injury or damage is sustained by third parties in the event of malfunction or failure of an electronic component.

3. The warnings, cautions and product-specific notes must be observed.

4. In order to satisfy certain technical requirements, some of the products described in this

publication may contain substances subject to restrictions in certain jurisdictions (e.g. because they are classed as hazardous). Useful information on this will be found in our Ma-

terial Data Sheets on the Internet (www.epcos.com/material). Should you have any more detailed questions, please contact our sales offices.

5. We constantly strive to improve our products. Consequently, the products described in this

publication may change from time to time. The same is true of the corresponding product

specifications. Please check therefore to what extent product descriptions and specifications contained in this publication are still applicable before or when you place an order. We also reserve the right to discontinue production and delivery of products. Consequently, we cannot guarantee that all products named in this publication will always be available. The aforementioned does not apply in the case of individual agreements deviating from the foregoing for customer-specific products.

6. Unless otherwise agreed in individual contracts, all orders are subject to the current ver-

sion of the "General Terms of Delivery for Products and Services in the Electrical Industry" published by the German Electrical and Electronics Industry Association (ZVEI).

7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CeraLink, CeraPlas, CSMP, CSSP,

CTVS, DeltaCap, DigiSiMic, DSSP, FilterCap, FormFit, MiniBlue, MiniCell, MKD, MKK, MLSC, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV, SIP5D, SIP5K, ThermoFuse, WindCap are trademarks registered or pending in Europe and in other countries. Further information will be found on the Internet at www.epcos.com/trademarks.

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