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
www.vishay.com For technical questions contact: ff3bresistors@vishay.com Document Number: 28717
58 Revision: 18-Jul-06
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
Document Number: 28717 For technical questions contact: ff3bresistors@vishay.com
Revision: 18-Jul-06 59
www.vishay.com
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
www.vishay.com For technical questions contact: ff3bresistors@vishay.com Document Number: 28717
60 Revision: 18-Jul-06
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