Metal Film Resistors, Industrial, Precision
CMF Industrial
Vishay Dale
www.vishay.com For technical questions, contact: ff2aresistors@vishay.com Document Number: 31018
18 Revision: 20-Jul-10
FEATURES
•Small size - conformal coated
•Flame retardant epoxy coating
•Controlled temperature coefficient
•Excellent high frequency characteristics
•Exceptionally low noise; typically 0.10 µV/V
•Low voltage coefficient to ± 5 ppm/V
•Compliant to RoHS directive 2002/95/EC
•Special tolerance and or TC matching available
on request
Vishay Dale Model CMF is also available as Military Qualified Styles RN and RL. See appropriate catalog or web page for the
MIL-SPEC ratings/attributes. (Except for marking, the Industrial and Military versions are exactly the same. Depending upon
stock, military marked parts may be supplied as industrial rated parts).
Note
(1) Continuous working voltage shall be or maximum working voltage, whichever is less
Note
(2) See the load life shift due to power and derating table for a summary of the more common combinations of power rating, case size and ambient
operating temperature that prevail in various industrial and military resistor specifications. The “performance” table qualifies the load life
stability under these combinations.
Note
(3) Tolerances of ± 0.5 % (D), ± 0.25 % (C) and ± 0.1 % (B) are available only in 50 ppm and 25 ppm temperature coefficients
* Pb containing terminations are not RoHS compliant, exemptions may apply
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
HISTORICAL
MODEL
MAXIMUM
WORKING
VOLTAGE
(1)
V
RESISTANCE RANGE
Ω
0.1 % to 1 % 0.1 % to 0.5 % 1 % to 5 % 1 % 2 %, 5 % 1 % 2 %, 5 % 1 % 2 %, 5 %
25 ppm/°C 50 ppm/°C 50 ppm/°C 100 ppm/°C 100 ppm/°C 150 ppm/°C 150 ppm/°C 200 ppm/°C 200 ppm/°C
CMF50 CMF-50 200 10 to 2.5M 10 to 2.5M 10 to 2.5M 10 to 2.5M 10 to 2.5M 10 to 22M 10 to 22M 10 to 22M 10 to 22M
CMF55 CMF-55 250 10 to 2.5M 10 to 2.5M 10 to 5M 1 to 22.1M 1 to 22.1M 0.5 to 50M 0.5 to 50M 0.5 to 50M 0.1 to 50M
CMF60 CMF-60 500 10 to 2.5M 10 to 2.5M 10 to 10M 1 to 10M 1 to 10M 0.5 to 10M 0.5 to 10M 0.5 to 10M 0.1 to 10M
CMF65 CMF-65 500 10 to 2.5M 10 to 2.5M 10 to 10M 1 to 15M 1 to 15M 0.5 to 22M 0.5 to 22M 0.5 to 22M 0.1 to 22M
CMF70 CMF-70 500 10 to 2.5M 10 to 2.5M 10 to 10M 1 to 15M 1 to 15M 1 to 22M 1 to 22M 1 to 22M 1 to 22M
CMF07 CMF-07 250 - - - - 5 to 5M - 1 to 5M - 1 to 5M
CMF20 CMF-20 500 - - - - 5 to 10M - 1 to 10M - 1 to 10M
MAXIMUM COMMERCIAL POWER RATING
WATTAGE (2) MODEL
CMF50 CMF55 CMF60 CMF65 CMF70 CMF07 CMF20
At + 70 °C 0.25 W 0.5 W 1 W 1 W 1 W 0.5 W 1 W
At + 125 °C 0.125 W 0.25 W 0.5 W 0.75 W 0.75 W - -
GLOBAL PART NUMBER INFORMATION
P x R
GLOBAL MODEL RESISTANCE VALUE TOLERANCE PACKAGING
CODE
(See Standard R = ΩB = ± 0.1 %E = 25 ppm EK = Lead (Pb)-free, bulk
EA = Lead (Pb)-free, T/R (full)
EB = Lead (Pb)-free,
T/R (1000 pieces)
Electrical K = kΩC = ± 0.25 %H = 50 ppm
Specifications M = MΩD = ± 0.5 %K = 100 ppm
table) R10000 = 0.1 ΩF = ± 1 %L = 150 ppm
680K00 = 680 kΩG = ± 2 %N = 200 ppm
1M0000 = 1.0 MΩJ = ± 5 %
New Global Part Numbering: CMF55301R00FKRE (preferred part numbering format)
CMF55301R00FKRE
Historical Part Number example: CMF-553010FT-1 (will continue to be accepted)
63R1-TF010355-FMC
HISTORICAL MODEL RESISTANCE VALUE TOLERANCE CODE TEMP. COEFFICIENT PACKAGING
Blank = Standard
(Dash Number)
(Up to 3 digits)
From
1 to 999
as applicable
70 = Color banded,
5 bands (≤ 1 %)
80 = Color banded,
4 bands (≥ 2 %)
SPECIAL
TEMPERATURE
COEFFICIENT
(3)
BF = Tin/lead, bulk
RE = Tin/lead, T/R (full)
R6 = Tin/lead, T/R (1000 pieces)
CMF Industrial
Metal Film Resistors, Industrial, Precision Vishay Dale
Document Number: 31018 For technical questions, contact: ff2aresistors@vishay.com www.vishay.com
Revision: 20-Jul-10 19
Notes
(1) 1.08" ± 0.125" (27.43 mm ± 3.18 mm) if tape and reel
(2) Available with 0.032" (0.813 mm) lead [CMF60..95]
(3) 0.290" (7.37 mm) for ± 0.25 % and ± 0.1 % resistance tolerances and values > 1 MΩ
(4) 0.260" ± 0.020" (6.60 mm ± 0.51 mm) for values > 5 MΩ
DIMENSIONS in inches (millimeters)
BD
C
(Max.)
1.500 ± 0.125 (1)
[38.10 ± 3.18] A
GLOBAL MODEL A B C
(Max.) D
CMF50 0.150 ± 0.020
(3.81 ± 0.51)
0.065 ± 0.015
(1.65 ± 0.38) 0.187 (4.75) 0.016 ± 0.002
(0.41 ± 0.05)
CMF55 0.240 ± 0.020 (4)
(6.10 ± 0.51)
0.090 ± 0.008
(2.29 ± 0.20) 0.278 (7.06) (3) 0.025 ± 0.002
(0.64 ± 0.05)
CMF60 0.344 ± 0.031
(8.74 ± 0.79)
0.145 ± 0.015
(3.68 ± 0.38) 0.425 (10.80) 0.025 ± 0.002 (2)
(0.64 ± 0.05)
CMF65 0.562 ± 0.031
(14.27 ± 0.79)
0.180 ± 0.015
(4.57 ± 0.38) 0.687 (17.45) 0.025 ± 0.002
(0.64 ± 0.05)
CMF70 0.562 ± 0.031
(14.27 ± 0.79)
0.180 ± 0.015
(4.57 ± 0.38) 0.687 (17.45) 0.032 ± 0.002
(0.81 ± 0.05)
CMF07 0.240 ± 0.020
(6.10 ± 0.51)
0.090 ± 0.008
(2.29 ± 0.20) 0.278 (7.06) 0.025 ± 0.002
(0.64 ± 0.05)
CMF20 0.375 ± 0.040
(9.53 ± 1.02)
0.145 ± 0.015
(3.68 ± 0.38) 0.425 (10.80) 0.032 ± 0.002
(0.81 ± 0.05)
TECHNICAL SPECIFICATIONS
PARAMETER UNIT CMF50 CMF55 CMF07 CMF60 CMF20 CMF65 CMF70
Maximum Working Voltage V≅≤ 200 ≤ 250 ≤ 250 ≤ 500 ≤ 500 ≤ 500 ≤ 500
Insulation Voltage (1 Min) Veff > 500
Voltage Coefficient (Max.) ppm/V ± 5 (measured between 10 % and full rated voltage)
Dielectric Strength VAC 450 450 450 750 750 900 900
Insulation Resistance Ω≥ 1011
Operating Temperature Range °C - 55 to + 175
Terminal Strength (Pull Test) lb 2 2 5 2 5 2 5
Noise dB 0.10 µV/V over a decade of frequency, with low and intermediate resistance values typically
below 0.5 µV/V
Weight (Max.) g 0.12 0.20 0.20 0.50 0.60 1.00 1.10
TEMPERATURE COEFFICIENT CODES
GLOBAL TC CODE HISTORICAL TC CODE TEMPERATURE COEFFICIENT
ET- 9 25 ppm/°C
HT- 2 50 ppm/°C
KT- 1 100 ppm/°C
LT- 0 150 ppm/°C
N T-00 200 ppm/°C
CMF Industrial
Vishay Dale Metal Film Resistors, Industrial, Precision
www.vishay.com For technical questions, contact: ff2aresistors@vishay.com Document Number: 31018
20 Revision: 20-Jul-10
LOAD LIFE SHIFT DUE TO POWER AND DERATING (AT 70 °C AND AT + 125 °C)
The power rating for the CMF parts is tied to the derating temperature, the heat rise of the parts, and the ΔR for the load life performance.
When the tables/graphs below are used together they show that when the parts are run at their higher power ratings, the parts will run
hotter, which has the potential of causing the resistance of the parts to shift more over the life of the part.
LOAD LIFE SHIFT VS. POWER RATING
LOAD LIFE MAXIMUM ΔR (TYPICAL TEST LOTS)
± 0.15 % ± 0.5 % ± 1.0 % ± 0.15 % ± 0.5 % ± 1.0 %
MODEL POWER RATING AT + 70 °C POWER RATING AT + 125 °C
CMF50 1/20 W and 1/10 W 1/8 W 1/4 W 1/20 W 1/10 W 1/8 W
CMF55, CMF07 1/10 W and 1/8 W 1/4 W 1/2 W 1/10 W 1/8 W 1/4 W
CMF60, CMF20 1/8 W and 1/4 W 1/2 W 3/4 W and 1 W 1/8 W 1/4 W 1/2 W
CMF65 1/4 W and 1/2 W 3/4 W 1 W 1/4 W 1/2 W 3/4 W
CMF70 1/4 W and 1/2 W 3/4 W 1 W 1/4 W 1/2 W 3/4 W
CMF resistors have an operating temperature range of - 55 °C to
+ 175 °C. They must be derated at high ambient temperatures
according to the derating curve.
Example:
When a CMF55 part is run at 1/8 W in a 70 °C ambient environment, the resistor will generate enough heat that the surface temperature of
the part will reach about 19 °C over the ambient temperature, and over the life of the part this could cause the resistance value to shift up to
± 0.15 %.
If the same resistor was instead run at 1/4 W in a 70 °C environment, the element will heat up to about 30 °C over ambient, and over the life
of the part the resistance value could shift roughly ± 0.5 %.
And if the resistor was run at it maximum power rating of 1/2 W in a 70 °C environment, it will heat up to about 58 °C over ambient, and you
could see the resistance value shift roughly ± 1 % over the life of the part.
MATERIAL SPECIFICATIONS
Element: Vacuum-deposited nickel-chrome alloy Coating:Flame retardant epoxy, formulated for superior
moisture protection
Core: Fire-cleaned high purity ceramic Solderability: Continuous satisfactory coverage when tested
in accordance with MIL-R-10509
AMBIENT TEMPERATURE IN °C
DERATING
120
100
80
60
40
20
0
% NI REWOP DETAR
- 55
- 50 - 25 025 70 75 100 125 150 165 175
50 200
APPLIED POWER IN W
THERMAL RESISTANCE
120
100
80
60
40
20
0
HEAT RISE (°C ABOVE AMBIENT)
0 0.125 0.25 0.375 0.5 0.75 0.875 11.1250.625
CMF50 CMF55,
CMF07
CMF60,
CMF20
CMF65,
CMF70
CMF Industrial
Metal Film Resistors, Industrial, Precision Vishay Dale
Document Number: 31018 For technical questions, contact: ff2aresistors@vishay.com www.vishay.com
Revision: 20-Jul-10 21
Note
• CMF07 and CMF20 parts are marked with color bands, either per
MIL-PRF-22684 (with a wide white band) or using commercial
color bands. CMFxx..70 and CMFxx..80 parts are marked using
commercial color bands.
SPECIAL MODIFICATIONS
1. Terminals may be supplied in any commercial material
with several type finishes.
2. Special pre-conditioning (power aging, temperature
cycling, etc.) to customer specifications.
3. Non-helixed resistors can be supplied for critical high
frequency applications.
4. Fusible, flameproof versions available.
MARKING
- Value
- Decade and tolerance
- Date code
(Alternately, parts may be MIL marked)
PERFORMANCE
TEST
(TEST METHODS - MIL-STD-202)
AT + 70 °C AT + 125 °C
MAXIMUM ΔR (TYPICAL TEST LOTS)
Short Time Overload ± 0.05 % ± 0.05 %
Low Temperature Operation ± 0.05 % ± 0.05 %
Moisture Resistance ± 0.05 % ± 0.05 %
Shock ± 0.01 % ± 0.01 %
Vibration ± 0.004 % ± 0.04 %
Temperature Cycling ± 0.15 % ± 0.15 %
Load Life Varies based on power rating used; see load life shift due to power and derating table
Dielectric Withstanding Voltage ± 0.01 % ± 0.01 %
Effect of Solder ± 0.03 % ± 0.03 %
Document Number: 91000 www.vishay.com
Revision: 11-Mar-11 1
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