Commercial Grade
Metal Film Resistor
CMF Series
•
Metal film resistor
•
Conformal coating
•
Power ratings from 1/8W to 3W
•
Resistance range from 10Ω to 1MΩ
Electrical Data
IRC Type
Power
Rating at
70°C (W)
Resistance
Range
(Ohms)
Tolerance
(±%)
TCR
(±ppm/°C)
Max.
Working
Voltage (V)
Max.
Overload
Voltage (V)
Dielectric
Withstanding
Voltage (V)
Standard Size
CMF-1/8
CMF-1/4
CMF-1/2
CMF-1
CMF-2
CMF-3
0.125
0.25
0.5
10 - 1M
1
2
3
1
100
500
500
500
1000
1000
1000
1000
1000
1000
200
250
350
400
500
700
400
500
700
Environmental Data
Short-time overload
Dielectric withstanding voltage
Terminal strength
Resistance to Soldering heat
Pulse Overload
Solderability
Resistance to solvent
Temperature cycling
Load life in humidity
Load life
ΔR/R
≤(±0.5%
+ 0.05Ω), with no evidence of mechanical damage.
No evidence of flashover, mechanical damage, arcing or insulation breakdown.
No evidence of mechanical damage.
ΔR/R
≤(±1%
+ 0.05Ω), with no evidence of mechanical damage.
ΔR/R
≤(±1%
+ 0.05Ω), with no evidence of mechanical damage.
Minimum 95% coverage.
No deterioration of protective coating and markings.
ΔR/R
≤(±1%
+ 0.05Ω), with no evidence of mechanical damage.
Standard type:
ΔR/R
±3% for <100KΩ, ±5% for
≥100KΩ;
Standard type:
ΔR/R
±1.5% Flame retardant type: R/R ±5%
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
CMF Series Issue May 2009 Sheet 1 of 3
© IRC Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Commercial Grade
Metal Film Resistor
Physical Data
d
D
H
L
H
Dimensions (mm)
IRC Type
Standard Size
CMF-1/8
CMF-1/4
CMF-1/2
CMF-1
CMF-2
CMF-3
D (max.)
1.85
2.5
3.5
5.0
5.5
6.5
L (max.)
3.5
6.8
10.0
12.0
16.0
17.5
d (±0.02)
0.5
0.6
0.6
0.7
0.8
0.8
H (±3)
28
28
28
28
28
28
© IRC Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
CMF Series Issue May 2009 Sheet 2 of 3
Commercial Grade
Metal Film Resistor
Derating Curve
-55°C
100
Percent Rated Load (%)
80
60
40
50
20
0
-60
-30
0
30
60
90
120 150 180
25
50
75
100
Ambient Temperature (°C)
+70°C
+155°C
Hot Spot Temperature Curve
200
Measuring position
150
CMF-200
100
CMF-100
CMF-50
CMF-25
CMF-12
Ordering Data
Specify type, resistance, tolerance, RoHS-Compliance and packaging.
This example is for a Metal Film Resistor, 1-watt, 1000Ω resistor.
Sample Part No.
IRC Type
CMF - Metal Film Resistor
CMF
- 1
1001
F
LF
TR
Power Rating
(See specs table)
Resistance Value (EIA 4-digit code)
(≥100Ω - First 3 significant digits plus 4th digit multiplier)
Example: 100 ohms = 1000, 1000 ohms = 1001
(>100Ω - "R" is used to designate decimal)
Example: 10Ω = 10R0, 1Ω = 1R00, 51Ω = 51R0
Tolerance
F = ±1%; G = ±2%; J = ±5%
RoHS- compliance
LF = RoHS compliant construction
Packaging
TR = tape and reel only
© IRC Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
CMF Series Issue May 2009 Sheet 3 of 3
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