Commercial Grade
Metal Film Resistor
CMF Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
09. 11
· Metal film resistor
· Conformal coating
· Power ratings from 1/8W to 3W
· Resistance range from 10Ω to 1MΩ
General Note
IRC reserves the right to make changes in product specifi cation 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
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Commercial Grade
Metal Film Resistor
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 0.125
10 - 1M 1 100
200 400 400
CMF-1/4 0.25 250 500 500
CMF-1/2 0.5 350 700 700
CMF-1 1 500 1000 1000
CMF-2 2 500 1000 1000
CMF-3 3 500 1000 1000
CMF Series
• Metal film resistor
• Conformal coating
• Power ratings from 1/8W to 3W
• Resistance range from 10: to 1M:
Environmental Data
Short-time overload 'R/R (±0.5% + 0.05:), with no evidence of mechanical damage.
Dielectric withstanding voltage No evidence of fl ashover, mechanical damage, arcing or insulation breakdown.
Terminal strength No evidence of mechanical damage.
Resistance to Soldering heat 'R/R (±1% + 0.05:), with no evidence of mechanical damage.
Pulse Overload 'R/R (±1% + 0.05:), with no evidence of mechanical damage.
Solderability Minimum 95% coverage.
Resistance to solvent No deterioration of protective coating and markings.
Temperature cycling 'R/R (±1% + 0.05:), with no evidence of mechanical damage.
Load life in humidity Standard type: 'R/R ±3% for <100K:, ±5% for 100K:
Load life Standard type: 'R/R ±1.5% Flame retardant type: R/R ±5%
CMF Series Issue May 2009 Sheet 1 of 3
General Note
IRC reserves the right to make changes in product specifi cation 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
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Commercial Grade
Metal Film Resistor
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 0.125
10 - 1M 1 100
200 400 400
CMF-1/4 0.25 250 500 500
CMF-1/2 0.5 350 700 700
CMF-1 1 500 1000 1000
CMF-2 2 500 1000 1000
CMF-3 3 500 1000 1000
CMF Series
• Metal film resistor
• Conformal coating
• Power ratings from 1/8W to 3W
• Resistance range from 10: to 1M:
Environmental Data
Short-time overload 'R/R (±0.5% + 0.05:), with no evidence of mechanical damage.
Dielectric withstanding voltage No evidence of fl ashover, mechanical damage, arcing or insulation breakdown.
Terminal strength No evidence of mechanical damage.
Resistance to Soldering heat 'R/R (±1% + 0.05:), with no evidence of mechanical damage.
Pulse Overload 'R/R (±1% + 0.05:), with no evidence of mechanical damage.
Solderability Minimum 95% coverage.
Resistance to solvent No deterioration of protective coating and markings.
Temperature cycling 'R/R (±1% + 0.05:), with no evidence of mechanical damage.
Load life in humidity Standard type: 'R/R ±3% for <100K:, ±5% for 100K:
Load life Standard type: 'R/R ±1.5% Flame retardant type: R/R ±5%
CMF Series Issue May 2009 Sheet 1 of 3
Commercial Grade
Metal Film Resistor
CMF Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
09. 11
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Physical Data
Commercial Grade
Metal Film Resistor
H
D
LH
d
CMF Series Issue May 2009 Sheet 2 of 3
Dimensions (mm)
IRC Type D (max.) L (max.) d (±0.02) H (±3)
Standard Size CMF-1/8 1.85 3.5 0.5 28
CMF-1/4 2.5 6.8 0.6 28
CMF-1/2 3.5 10.0 0.6 28
CMF-1 5.0 12.0 0.7 28
CMF-2 5.5 16.0 0.8 28
CMF-3 6.5 17.5 0.8 28
Commercial Grade
Metal Film Resistor
CMF Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
09. 11
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Commercial Grade
Metal Film Resistor
Sample Part No.
IRC Type
CMF - Metal Film Resistor
Power Rating
(See specs table)
Resistance Value (EIA 4-digit code)
(100: - First 3 signifi cant digits plus 4th digit multiplier)
Example: 100 ohms = 1000, 1000 ohms = 1001
(>100: - "R" is used to designate decimal)
Example: 10: = 10R0, 1: = 1R00, 51: = 51R0
Tolerance
F = ±1%; G = ±2%; J = ±5%
RoHS- compliance
LF = RoHS compliant construction
Packaging
TR = tape and reel only
Ordering Data
CMF - 1 1001 F LF TR
Specify type, resistance, tolerance, RoHS-Compliance and packaging.
This example is for a Metal Film Resistor, 1-watt, 1000: resistor.
Derating Curve
-55°C +70°C +155°C
-60 -30 0 30 60 90 120 150 180
100
80
60
40
20
Ambient Temperature (°C)
Percent Rated Load (%)
Hot Spot Temperature Curve
25 50 75 100
200
150
100
50
0
CMF-200
CMF-100
CMF-50
CMF-25
CMF-12
CMF Series Issue May 2009 Sheet 3 of 3
Measuring position