VISHAY CMA 0204 Technical data

CMA 0204

Vishay Beyschlag

High Pulse Load MELF Resistor

CMA 0204 speciality MELF resistors with advanced pulse
load capability are the perfect choice for the protection of
circuitry with signal or mains input lines from surge pulses.
The resistors are also suitable for circuits exposed to high
levels of electromagnetic interference or electrostatic
discharge. The applications are in all fields of automotive,
telecommunication, industrial and medical equipment.

FEATURES

• Special carbon film technology

• Up to 4 kV single pulse capability

• Up to 70 W continuous pulse load

• ESD capability: 6 kV, Human Body Model

• Compatible with lead (Pb)-free and lead containing

soldering processes

• Lead (Pb)-free and RoHS compliant

APPLICATIONS

• Automotive

• Telecommunication

• Industrial

• Medical equipment

METRIC SIZES

DIN: 0204

CECC: RC 3715M

TECHNICAL SPECIFICATIONS

DESCRIPTION CMA 0204

Metric CECC size RC 3715M

Resistance range 10 Ω to 100 kΩ

Resistance tolerance ± 2 %

Temperature coefficient see TCR graph

Operation mode standard power

Climatic category (LCT/UCT/days) 55/125/56 55/155/56

Rated dissipation, P

Operating voltage, U

Film temperature

Max. resistance change at P

|ΔR/R| after: 1000 h

Permissible voltage against ambient (insulation):

Failure rate ≤ 1 × 10

Note: These resistors do not feature a limited lifetime when operated within the permissible limits. However, resistance value drift increasing over

operating time may result in exceeding a limit acceptable to the specific application, thereby establishing a functional lifetime.

1)

The power dissipation on the resistor generates a temperature rise against the local ambient, depending on the heatflow support of the
printed-circuit board (thermal resistance). The rated dissipation applies only if the permitted film temperature is not exceeded. Furthermore, a
high level of ambient temperature or of power dissipation may raise the temperature of the solder joint, hence special solder alloys or board
materials may be required to maintain the reliability of the assembly.

2)

Film temperatures above the specified range may be permissible, e.g. 175 °C. Please contact the factory for details.

1)

70

AC/DC 200 V

max

2)

for resistance range, 10 Ω to 100 kΩ

70

8000 h ≤ 2 % ≤ 4 %

1 minute; U

continuous 75 V

ins

0.25 W 0.4 W

125 °C 155 °C

≤ 1 % ≤ 2 %

300 V

-9

/h

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CMA 0204

High Pulse Load MELF Resistor

12NC INFORMATION

• The resistors have a 12-digit numeric code starting with

2312.

• The subsequent 4 digits indicate the resistor type,
specification and packaging; see the 12NC table.

• The remaining 4 digits indicate the resistance value:

– The first 3 digits indicate the resistance value.

– The last digit indicates the resistance decade in

accordance with the 12NC Indicating Resistance
Decade table.

12NC - resistor type and packaging

DESCRIPTION

TYPE TOL.

CMA 0204 ± 2 % 159 2.... 149 2....

Last Digit of 12NC Indicating Resistance Decade

RESISTANCE DECADE LAST DIGIT

10 Ω to 99.9 Ω 9

100 Ω to 999 Ω 1

1 kΩ to 9.99 kΩ 2

10 kΩ to 99.9 kΩ 3

100 kΩ to 999 kΩ 4

12NC Example

The 12NC of a CMA 0204 resistor, value 47 kΩ with ± 2 %
tolerance, supplied in blister tape of 3000 units per reel is:
2312 159 24703.

ORDERING CODE 2312 ... .....

BLISTER TAPE ON REEL

BL B0

Vishay Beyschlag

PART NUMBER AND PRODUCT DESCRIPTION

PART NUMBER2): CMA02040X4701GB300

1)

CMA02040X4701GB300

MODEL/SIZE SPECIAL CHARACTER TC VALUE TOLERANCE

CMA0204 0 = neutral X = no indication 3 digit value

1 digit multiplier

Multiplier

-1

9 = *10

0

0 = *10

1

1 = *10

2

2 = *10

3

3 = *10

PRODUCT DESCRIPTION4): CMA 0204 2 % BL 4K7

CMA 0204 2 % BL 4K7

MODEL SIZE TOLERANCE PACKAGING

CMA 0204 ± 2 % BL

Notes

1. Products can be ordered using either the PRODUCT DESCRIPTION or the 12NC.

2. The PART NUMBER is shown to facilitate the introduction of the unified part numbering system. Currently, this PART NUMBER is applicable

in the Americas and in Asia/Pacific only.

3. Please refer to table PACKAGING, see below.

4. For CMA0204 the temperature coefficient is not identified in the PRODUCT DESCRIPTION.

G = ± 2 % B3

B0

PA C KA G I N G3)SPECIAL

up to 2 digits

B0

3)

RESISTANCE VALUE

00

100R = 100 Ω

4K7 = 4.7 kΩ

= standard

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CMA 0204

Vishay Beyschlag

PACKAGING

MODEL

CMA0204

DIMENSIONS

High Pulse Load MELF Resistor

BLISTER TAPE ON REEL

ACC. IEC 60286-3

DIAMETER PIECES/REEL

180 mm/7” 3000 B3 = BL

330 mm/13” 10 000 B0

L

Color code marking

D

D

1

L

1

1)

K

CODE

DIMENSIONS - MELF resistor types, mass and relevant physical dimensions

TYPE

CMA 0204 3.6 + 0/- 0.2 1.4 + 0/- 0.1 1.8 D + 0/- 0.15 0.8 ± 0.1 19

Color code marking is applied according to IEC 60062* in four bands (E24 series). Each color band appears as a single solid line, voids are

permissible if at least 1/3 of the band is visible from each radial angle of view. The last color band for tolerance is approx, 50 % wider than the

other bands. An interrupted band between the 2nd and 3rd full band identifies the special carbon film type.

L

(mm)

D

(mm)

L

1 min

(mm)

D

1

(mm)

K

(mm)

MASS

(mg)

TOLERANCE AND RESISTANCE RANGE

1)

TOLERANCE

± 2 % 10 Ω to 100 kΩ

1)

Resistance value to be selected from E24 series.

RESISTANCE VALUE

CMA 0204

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CMA 0204

High Pulse Load MELF Resistor

DESCRIPTION

Production of the CMA 0204 speciality MELF resistors with
advanced pulse load capability is strictly controlled and
follows an extensive set of instructions established for
reproducibility. A homogeneous and dense carbon film is
deposited on a high grade ceramic body (85 % Al
plated steel termination caps are firmly pressed on the
coated rods. A special laser is used to achieve the target
value by smoothly cutting a helical groove in the resistive
layer without damaging the ceramics. The resistors are
covered by protective coating designed for electrical,
mechanical and climatic protection.The terminations receive
a final pure tin on nickel plating. Four color code rings
designate the resistance value and tolerance in accordance
with IEC 60 062*.

The result of the determined production is verified by an
extensive testing procedure performed on 100 % of the
individual resistors. Only accepted products are laid directly
into the blister tape in accordance with IEC 60 286-3*.

2O3

). Nickel

Vishay Beyschlag

APPROVALS

Where applicable the resistors are tested in accordance with
EN 140401-803 (superseding CECC 40401-803) which
refers to EN 60115-1, EN 140400 and the variety of
enviromental text procedures of the IEC 60068* series.

Vishay BEYSCHLAG has achieved "Approval of

Manufacturer" in accordance with IEC QC 001002-3,
clause 2. The release certificate for “Technology Approval
Schedule” in accordance with CECC 240001 based on
IEC QC 001002-3, clause 6 is granted for the Vishay

BEYSCHLAG manufacturing process.

Note:

* The quoted IEC standards are also released as EN standards with
the same number and identical contents.

ASSEMBLY

The resistors are suitable for processing on automatic
SMD assembly systems. They are suitable for automatic
soldering using wave, reflow or vapour phase as shown in
IEC 61760-1*. Excellent solderability is proven, even after
extended storage in excess of 10 years. The encapsulation
is resistant to all cleaning solvents commonly used in the
electronics industry, including alcohols, esters and aqueous
solutions. The resistors are completely lead (Pb)-free, the
pure tin plating provides compatibility with lead (Pb)-free
soldering processes. The immunity of the plating against tin
whisker growth has been proven under extensive testing.

1)

All products comply with the GADSL

EECA-EICTA

2)

list of legal restrictions on hazardous
substances. This includes full compliance with the following
directives:

2000/53/EC End of Vehicle life Directive (ELV) and Annex II

•

(ELV II)

• 2002/95/EC Restriction of the use of Hazardous

Substances Directive (RoHS)

• 2002/96/EC Waste Electrical and Electronic Equipment

Directive (WEEE)

and the CEFIC-

1)

Global Automotive Declarable Substance List, see www.gadsl.org

2)

CEFIC (European Chemical Industry Council), EECA (European

Electronic Component Manufacturers Association), EICTA
(European trade organisation representing the information and
communications technology and consumer electronics), see
www.eicta.org
chemicals for electronics

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CMA 0204

Vishay Beyschlag

FUNCTIONAL PERFORMANCE

P

1

W

0.5

Power Dissipation

0

- 50 0 50

Derating - Standard Operation

P

1

High Pulse Load MELF Resistor

70

100

Ambient Temperature

CMA 0204

C

CMA 0204

150

ϑ

amb

W

0.5

Power Dissipation

0

- 50 0 50

Derating - Power Operation

max

P

100

W

10

Pulse Load

1

70

Ambient Temperature

C100 150

ϑ

CMA 0204

amb

0.1

10 µs 100 ms

Single Pulse

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100 µs 1 ms 10 ms

Maximum pulse load, single pulse; applicable if P 0 and n ≤ 1000 and U ≤ U

for permissible resistance change equivalent to 8000 h operation

1 s

Pulse Duration

max

10 s

t

;

i

CMA 0204

U

max

P

100

W

10

1

Continuous Pulse Load

0.1

10 µs 100 ms

100 µs 1 ms 10 ms

Maximum pulse load, continuous pulses; applicable if P ≤ P (

Continuous Pulses

max

U

High Pulse Load MELF Resistor

Pulse Duration

ϑ

) and U ≤ U

for permissible resistance change equivalent to 8000 h operation

amb

Vishay Beyschlag

CMA 0204

max

10 s

t

i

;

1 s

CMA 0204

1 kV

Pulse Voltage

100 V

Pulse Voltage

100 µs 1 ms 10 ms

Pulse Duration

Maximum pulse voltage, single and continuous pulses; applicable if P ≤ P

for permissible resistance change equivalent to 8000 h operation

1 s

max

10 s10 µs 100 ms

t

;

i

1 kV

Pulse Voltage

100 V

CMA 0204

10 V

10 Ω

Pulse load rating in accordance with IEC 60115-1, 4.27; 1,2 µs/50 µs; 5 pulses at 12 s intervals;

1.2/50 Pulse

100 Ω 1 kΩ 10 kΩ 100 kΩ

Resistance Value

for permissible resistance change 0.5 %

1 MΩ

R

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CMA 0204

U

Vishay Beyschlag

1 kV

Pulse Voltage

100 V

10 V

10/700 Pulse

- 100

ppm/K

- 200

10 Ω

High Pulse Load MELF Resistor

100 Ω 1 kΩ 10 kΩ 100 kΩ

Resistance Value

Pulse load rating in accordance with IEC 60115-1, 4.27; 10 µs/700 µs;

10 pulses at 1 minute intervals; for permissible resistance change 0.5 %

CMA 0204

1 MΩ

R

CMA 0204

- 300

Temperature Coefficient

- 400

- 500

10 Ω

100 Ω 1 kΩ 10 kΩ 100 kΩ

Temperature coefficient of resistance

1 MΩ

Resistance Value

10 MΩ

R

Temperature Coefficient (TCR)

1

A

1

µV/V

Current Noise

0.1

0.01

100 Ω

Current Noise - A

100 kΩ

In accordance with IEC 60 195

1

CMA 0204

Resistance Value

1 MΩ 1 kΩ 10 kΩ

R

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CMA 0204

High Pulse Load MELF Resistor

Vishay Beyschlag

TESTS AND REQUIREMENTS

Essentially all tests are carried out in accordance with the
following specifications:

EN 60115-1, generic specification
EN 140400, sectional specification
EN 140401-803, detail specification

The Test Procedures and Requirements table contains the
applicable tests selected from the documents listed above.

The tests are carried out in accordance with IEC 60068* and
under standard atmospheric conditions in accordance with
IEC 60068-1, 5.3*. Climatic category LCT/UCT/56 (rated
temperature range: Lower Category Temperature, Upper
Category Temperature; damp heat, long term, 56 days) is
valid.

Unless otherwise specified the following values apply:
Temperature: 15 °C to 35 °C
Relative humidity: 45 % to 75 %
Air pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar).

The components are mounted for testing on printed-circuit
boards in accordance with EN 140400, 2.3.3, unless
otherwise specified.

The requirements stated in the Test Procedures and
Requirements table are based on the required tests and
permitted limits of EN 140401-803.

TEST PROCEDURES AND REQUIREMENTS

IEC 60068-2*

EN

60115-1

CLAUSE

4.5 - resistance -± 2 % R

TEST

METHOD

TEST PROCEDURE

stability for product types:

CMA 0204 10 Ω to 100 kΩ

REQUIREMENTS

PERMISSIBLE CHANGE (ΔR)

4.8.4.2

4.25.1 -

4.25.1 -

4.25.3 -

4.24 78 (Cab) damp heat, steady state (40 ± 2) °C; 56 days; (93 ± 3) % RH ± (1 % R +0.1Ω)

4.23 climatic sequence:

4.23.2 2 (Ba) dry heat UCT; 16 h

4.23.3 30 (Db) damp heat, cyclic 55 °C; 24 h; ≥ 90 % RH; 1 cycle

4.23.4 1 (Aa) cold LCT; 2 h

4.23.5 13 (M) low air pressure 8.5 kPa; 2 h; (25 ± 10) °C

4.23.6 30 (Db) damp heat, cyclic 55 °C; 24 h; ≥ 90 % RH; 5 cycles

4.23.7 - d.c. load

- 1 (Aa) cold - 55 °C; 2 h ± (0.5 % R +0.1 Ω)

- temperature coefficient

endurance at 70 °C:
standard operation mode

endurance at 70 °C:
power operation mode

endurance at upper category
temperature

at 20/- 55/20 °C
and 20/125/20 °C

P70R×

U = ≤ U

1.5 h on; 0.5 h off;

70 °C; 1000 h ± (1 % R +0.05 Ω)

70 °C; 8000 h ± (2 % R +0.05 Ω)

P70R×

U = ≤ U

1.5 h on; 0.5 h off;

70 °C; 1000 h ± (2 % R +0.05 Ω)

70 °C; 8000 h ± (4 % R +0.05 Ω)

125 °C; 1000 h ± (2 % R +0.05 Ω)

155 °C; 1000 h ± (4 % R +0.05 Ω)

U = ≤ U

P70R×

LCT = - 55 °C; UCT = 155 °C ± (1 % R +0.1 Ω)

max

max

max

;

;

; 1 min.

see Temperature Coefficient graph

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CMA 0204

Vishay Beyschlag

High Pulse Load MELF Resistor

TEST PROCEDURES AND REQUIREMENTS

IEC 60068-2*

EN

60115-1

CLAUSE

4.19 14 (Na) rapid change of temperature

4.13 -

4.40 -

4.29 45 (XA) component solvent resistance isopropyl alcohol; 50 °C; method 2 no visible damage

4.30 45 (XA) solvent resistance of marking

4.17.2 58 (Td) solderability solder bath method;

TEST

METHOD

TEST PROCEDURE

short time overload;
standard operation mode

short time overload;
power operation mode

electrostatic discharge
(Human body Model)

stability for product types:

CMA 0204 10 Ω to 100 kΩ

30 minutes at - 55 °C;
30 minutes at + 125 °C; 5 cycles

U = 2.5 × ≤ 2 × U

U = 2.5 × ≤ 2 × U

IEC 61340-3-1*;
3 pos. + 3 neg. discharges
CMA 0204: 6 kV

isopropyl alcohol; 50 °C; method 1,
toothbrush

SnPb40;
non-activated flux;
(215 ± 3) °C; (3 ± 0.3) s

solder bath method;
SnAg3Cu0.5 or
SnAg3.5; non-activated flux;
(235 ± 3) °C; (2 ± 0.2) s

P70R×

P70R×

; 5 s ± (0.25 % R +0.1 Ω)

max

; 5 s ± (0.25 % R +0.1 Ω)

max

REQUIREMENTS

PERMISSIBLE CHANGE (ΔR)

± (0.5 % R +0.1 Ω)

± (0.5 % R + 50 mΩ)

marking legible;

no visible damage

good tinning (≥ 95 % covered);

no visible damage

good tinning (≥ 95 % covered);

no visible damage

4.18.2 58 (Td) resistance to soldering heat

4.32 21 (Ue

4.7 - voltage proof U

4.35 - flammability IEC 60 695-11-5*, needle flame test; 10 no burning after 30 s

Note:

* The quoted IEC standards are also released as EN standards with the same number and identical contents.

) shear (adhesion) 45 N no visible damage

3

solder bath method ; (260 ± 5)°C; (10± 1) s

= U

rms

; 60 s no flashover or breakdown

ins

± (0.5 % R +0.1 Ω)

REVISION HISTORY

Compared to the prior revision of this datasheet, 27-Feb-04, the following changes have been applied:

• Introduction of a standardized part numbering system

• Additional emphasis on the clean balance of materials and on the compliance with various EU directives

• Revision of the current noise diagram based on new test results

• Introduction of a test and requirements for electrostatic discharge (ESD)

• No other change of technical contents

• No product change

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Legal Disclaimer Notice

Vishay

Disclaimer

All product specifications and data are subject to change without notice.

Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.

Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.

The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.

Product names and markings noted herein may be trademarks of their respective owners.

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