CFM Series — Carbon Film Resistors
Features
• General purpose resistor ideal for commercial/industrial applications
• Flame retardant coatings standard, flameproof optional (contact factory)
• Pana-Sert available on selected sizes (contact factory)
• Auto sequencing/insertion compatible
• CFM (mini) an ideal choice when size constraints apply
Electrical Specifications
Type
Power Rating
(Watts)
@ 70°C
0.125W
0.25W
0.5W
1W
2W
0.25W
0.5W
Maximum
Working
Voltage*
250
350
350
500
500
250
250
Maximum
Pulse Voltage
500
600
700
1000
1000
500
500
Dielectric Withstanding
Voltage
300
500
700
1000
1000
500
500
Ohmic Range and Tolerance
2%
10Ω – 4.7M
1Ω – 4.7M
1Ω – 4.7M
1Ω – 1M
1Ω – 1M
10Ω – 1M
10Ω – 4.7M
5%
1Ω – 22M
1Ω – 22M
1Ω – 22M
1Ω – 22M
1Ω – 22M
1Ω – 22M
1Ω – 22M
CF 1/8
CF 1/4
CF 1/2
CF 1
CF 2
CFM 1/4
CFM 1/2
* Lesser of
√
PR or maximum working voltage.
How to Order
CFM
SEI Type
E
Type
CF
CFM
Description
EIA Std
Mini
Code
1/8
1/4
1/2
1
2
Tolerance
2%
5%
Values
E24
E24
Code
R
R
R
R
T
A
Description
Tape
Tape
Tape
Tape
Ammo
Bulk
SEI Types
CF 1/8, CF 1/4, CF 1/2
CFM 1/4, CFM 1/2
CF1
CF2
All
All
Qty
5000
5000
2000
1000
5000
1000
1/2
Code
4.7K
Nominal Resistance
5%
Tolerance
R
Packaging
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
37
email: marketing@seielect.com
CFM Series — Carbon Film Resistors
Mechanical Specifications
Type
CF 1/8
CF 1/4
CF 1/2
CF 1
CF 2
CFM 1/4
CFM 1/2
inches
mm
C
Lead Length (Bulk)
1.10
±
0.12
28.0
±
3.0
1.10
±
0.12
28.0
±
3.0
1.10
±
0.12
28.0
±
3.0
1.18
±
0.12
30.0
±
3.0
1.18
±
0.12
30.0
±
3.0
1.10
±
0.12
28.0
±
3.0
1.10
±
0.12
28.0
±
3.0
A
Body Length
0.13
±
0.01/-0
3.2
±
0.2/-0
0.26
±
0.02
6.5
±
0.5
0.33
±
0.02
8.5
±
0.50
0.43
±
0.04
11.0
±
1.0
0.59
±
0.04
15.0
±
1.0
0.13
±
0.01/-0
3.2
±
0.2/-0
0.26
±
0.002
6.5
±
0.05
B
Body Diameter
0.07
±
0.01
1.7
±
0.2
0.091
±
0.008
2.3
±
0.2
0.11
±
0.02
2.7
±
0.5
0.18
±
0.02
4.5
±
0.5
0.20
±
0.02
5.0
±
0.5
0.07
±
0.004
1.9
±
0.1
0.09
±
0.01
2.3
±
0.2
D
Lead Diameter
0.018
±
0.002
0.45
±
0.05
0.022
±
0.002
0.56
±
0.05
0.024
±
0.002
0.60
±
0.05
0.031
±
0.004
0.80
±
0.1
0.031
±
0.004
0.80
±
0.1
0.018
±
0.002
0.45
±
0.05
0.022
±
0.002
0.56
±
0.05
Performance Characteristics
Test
Short TIme Overload
Resistance to Solder Heat
Dielectric Withstanding Voltage
Load Life
Terminal Strength
Moisture Resistance
Standard / Method
EIA-RS-172-B 3.2.6
MIL-STD 202, Method 210
JIS C 5202 5.6
MIL-STD 202, Method 108
MIL-STD 202, Method 211
MIL-STD 202, Method 106
Requirement
± 0.5%
± 0.5%
± 0.5%
± 1.0%
± 0.2%
± 0.5%
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
38
email: marketing@seielect.com
