CMA 0204
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High Pulse Load Carbon Film MINI-MELF Resistors
CMA 0204 carbon film 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
• Surge voltage capability up to 4 kV 1.2/50 μs
pulse
• ESD capability: 6 kV, human body model
• AEC-Q200 qualified
• Intrinsic sulfur resistance
• Material categorization:
for definitions of compliance please see
www.vishay.com/doc?99912
APPLICATIONS
• Automotive
• Telecommunication
• Industrial
• Medical equipment
Note
(1) Please refer to APPLICATION INFORMATION below
APPLICATION INFORMATION
The power dissipation on the resistor generates a temperature rise against the local ambient, depending on the heat flow
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.
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. At the maximum permissible film temperature of 155 °C the useful lifetime is specified for 8000 h. The
designer may estimate the performance of the particular resistor application or set certain load and temperature limits in order
to maintain a desired stability.
TECHNICAL SPECIFICATIONS
DESCRIPTION CMA 0204
DIN size 0204
Metric size code RC3715M
Resistance range 10 to 100 k
Resistance tolerance ± 2 %
Temperature coefficient see TCR graph
Rated dissipation, P70 (1) 0.4 W
Operating voltage, Umax. ACRMS/DC 200 V
Permissible film temperature,
F max. (1) 155 °C
Operating temperature range (1) -55 °C to 155 °C
Permissible voltage against ambient (insulation):
1 min; Uins 300 V
Failure rate: FITobserved 0.1 x 10-9/h
CMA 0204
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Note
• Products can be ordered using either the PART NUMBER or the PRODUCT DESCRIPTION
MAXIMUM RESISTANCE CHANGE AT RATED DISSIPATION
OPERATION MODE STANDARD POWER
Rated dissipation, P70 CMA 0204 0.25 W 0.4 W
Operating temperature range -55 °C to 125 °C -55 °C to 155 °C
Permissible film temperature,
F max. 125 °C 155 °C
Max. resistance change at P70 for resistance range,
|R/R| after:
CMA 0204 10 to 100 k10 to 100 k
1000 h 1 % 2 %
8000 h 2 % 4 %
TEMPERATURE COEFFICIENT AND RESISTANCE RANGE
TYPE / SIZE TCR TOLERANCE RESISTANCE E-SERIES
CMA 0204 see TCR graph ± 2 % 10 to 100 kE24
PACKAGING
TYPE / SIZE CODE QUANTITY PACKAGING STYLE WIDTH PITCH PACKAGING
DIMENSIONS
CMA 0204 B3 = BL 3000 Antistatic blister tape
acc. IEC 60286-3 Type 2a 8 mm 4 mm Ø 180 mm / 7"
B0 10 000 Ø 330 mm / 13"
PART NUMBER AND PRODUCT DESCRIPTION
Part Number: CMA02040X4701GB300
TYPE / SIZE VERSION TCR RESISTANCE TOLERANCE PACKAGING
CMA0204 0 = neutral X = no indication 3 digit value
1 digit multiplier
Multiplier
9 = *10-1
0 = *100
1 = *101
2 = *102
3 = *103
G = ± 2 % B3
B0
Product Description: CMA 0204 2 % BL 4K7
CMA 0204 2 % BL 4K7
TYPE SIZE TOLERANCE PACKAGING RESISTANCE
CMA 0204 ± 2 % BL
B0
100R = 100
4K7 = 4.7 k
CMA 020 40X4701GB3 00
CMA 0204
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DESCRIPTION
Production of the CMA 0204 specialty 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 % Al2O3).
Nickel 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 matte tin on nickel plating. Four color code rings
designate the resistance value and tolerance in accordance
with IEC 60062 (1).
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 60286-3,
Type 2a (1).
ASSEMBLY
The resistors are suitable for processing on automatic SMD
assembly systems. They are suitable for automatic
soldering using wave, reflow or vapor phase as shown in
IEC 61760-1 (1). Solderability is specified for 2 years after
production or requalification, however, excellent
solderability is proven after extended storage in excess of
10 years. The permitted storage time is 20 years.
The resistors are completely lead (Pb)-free, the pure matte
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.
The encapsulation is resistant to all cleaning solvents
commonly used in the electronics industry, including
alcohols, esters and aqueous solutions. The suitability of
conformal coatings, potting compounds and their
processes, if applied, shall be qualified by appropriate
means to ensure the long-term stability of the whole system.
MATERIALS
Vishay acknowledges the following systems for the
regulation of hazardous substances:
• IEC 62474, Material Declaration for Products of and for the
Electrotechnical Industry, with the list of declarable
substances given therein (2)
• The Global Automotive Declarable Substance List
(GADSL) (3)
• The REACH regulation (1907/2006/EC) and the related list
of substances with very high concern (SVHC) (4) for its
supply chain
The products do not contain any of the banned substances
as per IEC 62474, GADSL, or the SVHC list, see
www.vishay.com/how/leadfree.
Hence the products fully comply with the following
directives:
• 2000/53/EC End-of-Life Vehicle Directive (ELV) and
Annex II (ELV II)
• 2011/65/EU Restriction of the Use of Hazardous
Substances Directive (RoHS) with amendment
2015/863/EU
• 2012/19/EU Waste Electrical and Electronic Equipment
Directive (WEEE)
Vishay pursues the elimination of conflict minerals from its
supply chain, see the Conflict Minerals Policy at
www.vishay.com/doc?49037.
APPROVALS
Where applicable the resistors are tested in accordance with
EN 140 401-803 which refers to EN 60115-1, EN 60115-8
and the variety of environmental test procedures of the
IEC 60068 (1) series.
Vishay Beyschlag has achieved “Approval of
Manufacturer” in accordance with IECQ 03-1. The release
certificate for “Technology Approval Schedule” in
accordance with CECC 240001 based on IECQ 03-3-1 is
granted for the Vishay Beyschlag manufacturing process.
The resistors are qualified according to AEC-Q200.
RELATED PRODUCTS
• “Professional Thin Film MELF Resistors”
(www.vishay.com/doc?28713)
• “Precision Thin Film MELF Resistors”
(www.vishay.com/doc?28714)
• “High Pulse Load Carbon Film MELF Resistors of case
size 0207” (www.vishay.com/doc?28755)
Notes
(1) The quoted IEC standards are also released as EN standards with the same number and identical contents
(2) The IEC 62474 list of declarable substances is maintained in a dedicated database, which is available at http://std.iec.ch/iec62474
(3) The Global Automotive Declarable Substance List (GADSL) is maintained by the American Chemistry Council and available at www.gadsl.org
(4) The SVHC list is maintained by the European Chemical Agency (ECHA) and available at http://echa.europa.eu/candidate-list-table
CMA 0204
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FUNCTIONAL PERFORMANCE
CMA 0204
0.5
W
Power Dissipation P
°C100 150-50 50 70
0
Ambient Temperature
ϑ
amb
Derating - Standard Operation
0
CMA 0204
0.5
W
Power Dissipation P
°C100 150-50 50 70
0
Ambient Temperature
ϑ
amb
Derating - Power Operation
0
1
0.1
10 s1 s100 ms
10 ms
1 ms100 µs10 µs1 µs
Pulse Duration ti
Single Pulse
Maximum pulse load, single pulse; applicable if P 0 and n ≤ 1000 and U ≤ 2 kV;
for permissible resistance change ± (0.5 % R + 0.05 Ω)
Pulse Load
P
max.
1000
W
100
10
CMA 0204
CMA 0204
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FUNCTIONAL PERFORMANCE
1
0.1
10 s1 s100 ms
10 ms
1 ms100 µs10 µs1 µs
Pulse Duration ti
Continuous Pulse Load
P
max.
1000
W
100
10
CMA 0204
Continuous Pulse
Maximum pulse load, continuous pulse; applicable if P ≤ P (ϑamb) and U ≤ 2 kV;
for permissible resistance change ± (0.5 % R + 0.05 Ω)
100 Ω1 kΩ 10 kΩ100 kΩ
10 Ω1 MΩ
100 V
1 kV
10 V
Pulse load rating in accordance with IEC 60115-1, 4.27; 1,2 μs/50 μs; 5 pulses at 12 s intervals;
for permissible resistance change ± (0.5 % R + 0.05 Ω)
1.2/50 Pulse
Pulse Voltage U
Resistance Value R
CMA 0204
100 Ω1 kΩ 10 kΩ100 kΩ
10 Ω1 MΩ
100 V
1 kV
10 V
10/700 Pulse
Pulse Voltage U
Resistance Value R
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 % R + 0.05 Ω)
CMA 0204
CMA 0204
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FUNCTIONAL PERFORMANCE
100 Ω1 kΩ 10 kΩ100 kΩ
10 Ω10 MΩ
Temperature Coefficient (TCR) (Typical Curve)
Temperature Coefficient
Resistance Value R
1 MΩ
- 500
ppm/K
- 400
- 300
- 200
- 100
Temperature coefficient of resistance
CMA 0204
1 kΩ 10 kΩ100 kΩ
100 Ω1 MΩ
0.1
1
0.01
Current Noise Voltage Ratio
Current Noise Voltage Ratio
Resistance Value R
µV/V
In accordance with IEC 60 195
CMA 0204
CMA 0204
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TESTS AND REQUIREMENTS
All tests are carried out in accordance with the following
specifications:
EN 60115-1, generic specification
EN 60115-8 (successor of EN 140400), sectional
specification
EN 140401-803, detail specification
IEC 60068-2-xx, test methods
The parameters stated in the Test Procedures and
Requirements table are based on the required tests and
permitted limits of EN 140401-803. The table presents only
the most important tests, for the full test schedule refer to
the documents listed above. However, some additional
tests and a number of improvements against those
minimum requirements have been included.
The testing also covers most of the requirements specified
by EIA/ECA-703 and JIS-C-5201-1.
The tests are carried out under standard atmospheric
conditions in accordance with IEC 60068-1, 4.3, whereupon
the following values are applied:
Temperature: 15 °C to 35 °C
Relative humidity: 25 % to 75 %
Air pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar).
A climatic category LCT / UCT / 56 is applied, defined by the
lower category temperature (LCT), the upper category
temperature (UCT), and the duration of exposure in the
damp heat, steady state test (56 days).
The components are mounted for testing on printed circuit
boards in accordance with EN 60115-8, 2.4.2, unless
otherwise specified.
TEST PROCEDURES AND REQUIREMENTS
EN
60 115-1
CLAUSE
IEC
60 068-2 (1)
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
PERMISSIBLE CHANGE (R)
Stability for product types:
CMA 0204 10 to 100 k
4.5 -Resistance -± 2 % R
4.8 -Temperature coefficient At (20 / -55 / 20) °C
and (20 / 125 / 20) °C see Temperature Coefficient graph
4.25.1
-Endurance at 70 °C:
standard operation mode
U = Umax.;
whichever is the less severe;
1.5 h on; 0.5 h off;
70 °C; 1000 h ± (1 % R + 0.05)
70 C; 8000 h ± (2 % R + 0.05)
-Endurance at 70 C:
power operation mode
U = Umax.;
whichever is the less severe;
1.5 h on; 0.5 h off;
70 °C; 1000 h ± (2 % R + 0.05)
70 C; 8000 h ± (4 % R + 0.05)
4.25.3 -Endurance at upper category
temperature
125 °C; 1000 h ± (2 % R + 0.05)
155 °C; 1000 h ± (4 % R + 0.05)
4.24 78 (Cab) Damp heat, steady state (40 ± 2C; 56 days; (93 ± 3) % RH ± (1 % R + 0.1 )
4.37 67 (Cy)
Damp heat,
steady state,
accelerated
(85 ± 2) °C
(85 ± 5) % RH
U = 100 V
and U = 0.3 x Umax.;
(the smaller value is valid)
1000 h
± (2 % R + 0.1 )
4.23 Climatic sequence:
4.23.2 2 (Bb) 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 (Ab) 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 -DC load U = Umax.; 1 min
LCT = -55 C; UCT = 155 °C ± (1 % R + 0.1 )
-1 (Aa) Cold -55 C; 2 h ± (0.5 % R + 0.1)
P70 x R
P70 x R
0.3 x P70 x R
P70 x R
CMA 0204
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Note
(1) The quoted IEC standards are also released as EN standards with the same number and identical contents
4.19 14 (Na) Rapid change of temperature
30 min at LCT;
30 min at UCT;
LCT = -55 °C; UCT = 125 °C
5 cycles ± (0.5 % R + 0.1 )
1000 cycles ± (1.5 % R + 0.1 )
4.13 -
Short time overload;
standard operation mode
U = 2.5 x 2 x Umax.;
whichever is the less severe;
5 s
± (0.25 % R + 0.1 )
Short time overload;
power operation mode
U = 2.5 x 2 x Umax.;
whichever is the less severe;
5 s
± (0.5 % R + 0.1 )
4.22 6 (Fc) Vibration
Endurance by sweeping;
10 Hz to 2000 Hz;
no resonance;
amplitude 1.5 mm or
200 m/s2; 7.5 h
± (0.25 % R + 0.1)
4.38 -Electrostatic discharge
(human body model)
IEC 61340-3-1 (1);
3 pos. + 3 neg.
(equivalent to MIL-STD-883,
method 3015)
CMA 0204: 6 kV
± (0.5 % R + 0.05 )
4.17 58 (Td) Solderability
Solder bath method;
SnPb40;
non-activated flux;
(215 ±3) °C; (3 ± 0.3) s
Good tinning ( 95 % covered);
no visible damage
Solder bath method;
SnAg3Cu0.5 or
SnAg3.5; non-activated flux;
(235 ± 3) °C; (2 ±0.2) s
Good tinning ( 95 % covered);
no visible damage
4.18 58 (Td) Resistance to soldering heat
Solder bath method;
(260 ± 5) C; (10 ± 1) s ± (0.5 % R + 0.1 )
Reflow method 2
(IR / forced gas convection);
(260 ± 5) °C; (10 ± 1) s
± (0.25 % R + 0.1 )
4.29 45 (XA) Component solvent resistance Isopropyl alcohol; 50 °C; method 2 No visible damage
4.30 45 (XA) Solvent resistance of marking Isopropyl alcohol; 50 C; method 1,
toothbrush
Marking legible;
no visible damage
4.32 21 (Ue3)Shear (adhesion) 45 N No visible damage
4.33 21 (Ue1) Substrate bending Depth 2 mm, 3 times
No visible damage;
no open circuit in bent position
± (0.25 % R + 0.1)
4.7 -Voltage proof URMS = Uins; 60 s No flashover or breakdown
4.35 -Flammability
IEC 60695-11-5 (1),
needle flame test;
10 s
No burning after 30 s
TEST PROCEDURES AND REQUIREMENTS
EN
60 115-1
CLAUSE
IEC
60 068-2 (1)
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
PERMISSIBLE CHANGE (R)
Stability for product types:
CMA 0204 10 to 100 k
P70 x R
P70 x R
CMA 0204
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DIMENSIONS
Note
• Color code marking is applied according to IEC 60062 (1) in four bands (E24 series). Each color band appears as a single solid line, voids are
permissible if at least 2/3 of the band is visible from each radial angle of view. The last color band for tolerance is approximately 50 % wider
than the other bands. An interrupted brown band between the 2nd and 3rd full band identifies the special carbon film
PATTERN STYLES FOR MELF RESISTORS
Notes
• The given solder pad dimensions reflect the considerations for board design and assembly as outlined e.g. in standards IEC 61188-5-x (1),
or in publication IPC-7351
(1) The quoted IEC standards are also released as EN standards with the same number and identical contents
DIMENSIONS AND MASS
TYPE / SIZE L
(mm)
D
(mm)
L1 min.
(mm)
D1
(mm)
K
(mm)
MASS
(mg)
CMA 0204 3.6 + 0/- 0.2 1.4 + 0/- 0.1 1.8 D + 0/- 0.15 0.75 ± 0.1 19
RECOMMENDED SOLDER PAD DIMENSIONS
TYPE / SIZE
WAVE SOLDERING REFLOW SOLDERING
G
(mm)
Y
(mm)
X
(mm)
Z
(mm)
G
(mm)
Y
(mm)
X
(mm)
Z
(mm)
CMA 0204 1.5 1.5 1.8 4.5 1.7 1.2 1.6 4.1
L
1
K
D
1
D
L
GX
Y
Z
CMA 0204
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HISTORICAL 12NC INFORMATION
• The resistors had a 12-digit numeric code starting with
2312
• The subsequent 4 digits indicated the resistor type,
specification and packaging; see the 12NC table
• The remaining 4 digits indicated the resistance value:
- The first 3 digits indicated the resistance value
- The last digit indicated the resistance decade in
accordance with the 12NC Indicating Resistance
Decade table
Last Digit of 12NC Indicating Resistance Decade
Historical 12NC Example
The 12NC of a CMA 0204 resistor, value 47 k with ± 2 %
tolerance, supplied in blister tape of 3000 units per reel was:
2312 159 24703.
RESISTANCE DECADE LAST DIGIT
10 to 99.9 9
100 to 999 1
1 k to 9.99 k2
10 k to 99.9 k3
100 k to 999 k4
HISTORICAL 12NC - Resistor Type and Packaging
DESCRIPTION
CODE 2312 ... .....
BLISTER TAPE ON REEL
TYPE TOL. BL
3000 UNITS
B0
10 000 UNITS
CMA 0204 ± 2 % 159 2.... 149 2....
Legal Disclaimer Notice
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Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
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 in any datasheet or in any other
disclosure relating to any product.
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Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
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statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular application.
Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over
time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s
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including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
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