Page 30
Carbon Film Resistors
SEI
Type CF
•
•
•
•
•
•
General Purpose Type
Meets Requirements of MIL-PERF-22684
Ideal for Commercial/Industrial Applications
Auto Sequencing/Insertion Compatible
Flame Retardant Coatings Standard, Flame Proof
4
Optional
Pana-Sert Available (1/4W) – See Page 43 for Specifications
PERFORMANCE CHARACTERISTICS (TESTED PER MIL-STD-202)
ELECTRICAL
Power Rating (Watts)
Derated to 0 Load at
Maximum Working Voltage
Operating Temperature Range
Resistance Range (±5%)
(±2%)
Dielectric Withstand Voltage
Maximum Pulse Voltage
Insulation Resistance
CF 1/8
1/8 @70°C
155°C
√PR
or 200V
whichever is less
-55°C to +155°C
1.0Ω – 22M
10Ω – 4.7M
300 volts RMS min.
400V
10,000 meg min.
<100K ±(3%+0.05Ω)
≥100K ±(5%+0.05Ω)
±0.5%
<100K ±(2%+0.05Ω)
≥100K ±(3%+0.05Ω)
±0.2%
±0.5%
±0.5%
-10 ppm/V max.
±(0.75%+0.05Ω)
CF 1/4
1/4 @70°C
155°C
√PR
or 250V
whichever is less
-55°C to +155°C
1.0Ω – 22M
1.0Ω – 4.7M
500 volts RMS min.
600V
10,000 meg min.
<100K ±(3%+0.05Ω)
≥100K ±(5%+0.05Ω)
±0.5%
<100K ±(2%+0.05Ω)
≥100K ±(3%+0.05Ω)
±0.2%
±0.5%
±0.5%
-10 ppm/V max.
±(0.75%+0.05Ω)
CF 1/2
1/2 @70°C
155°C
√PR
or 350V
whichever is less
-55°C to +155°C
1.0Ω – 22M
10Ω – 4.7M
700 volts RMS min.
700V
10,000 meg min.
<100K ±(3%+0.05Ω)
≥100K ±(5%+0.05Ω)
±0.5%
<100K ±(2%+0.05Ω)
≥100K ±(3%+0.05Ω)
±0.2%
±0.5%
±0.5%
-10 ppm/V max.
±(0.75%+0.05Ω)
CF 1
1 @70°C
155°C
√PR
or 500V
whichever is less
-55°C to +155°C
10Ω – 22M
1000 volts RMS min.
750V
10,000 meg min.
<100K ±(3%+0.05Ω)
≥100K ±(5%+0.05Ω)
±0.5%
<100K ±(2%+0.05Ω)
≥100K ±(3%+0.05Ω)
±0.2%
±0.5%
±0.5%
-10 ppm/V max.
±(0.75%+0.05Ω)
CF 2
2 @70°C
155°C
√PR
or 500V
whichever is less
-55°C to +155°C
10Ω – 22M
1000 volts RMS min.
750V
10,000 meg min.
<100K ±(3%+0.05Ω)
≥100K ±(5%+0.05Ω)
±0.5%
<100K ±(2%+0.05Ω)
≥100K ±(3%+0.05Ω)
±0.2%
±0.5%
±0.5%
-10 ppm/V max.
±(0.75%+0.05Ω)
ENVIRONMENTAL
Moisture Resistance
Thermal Shock
Load Life @ 70°C — 1,000
hrs
Shock and Vibration
Resistance to Soldering Heat
Terminal Strength
Voltage Coefficient
Short Time Overload
DIMENSIONS:
FEATURE
A – Lead Length (typ.)
B – Body Length
C – Lead Diameter
D – Body Diameter
2
1.10
Inches (mm)
CF 1/2
1.10
CF 1/8
±
.08 (28.0
±
2.0)
±
.001 (0.45
±
0.02)
±
.01 (1.8
±
0.15)
1.10
.13 +.01/-0 (3.2 +0.2/-0)
.018
.07
CF 1/4
±
.08 (28.0
±
2.0)
.24
±
.01 (6.0
±
0.3)
.022
±
.001 (0.55
±
0.03)
.09
±
.01 (2.3
±
0.2)
CF 1
1.10
CF 2
1.10
±
.08 (28.0
±
2.0)
.33
±
.02 (8.5
±
0.5)
.026
±
.002 (0.65
±
0.05)
.11
±
.01 (2.8
±
0.3)
±
.08 (28.0
±
2.0)
.43
±
.02 (11.0
±
0.5)
.031
±
.002 (0.80
±
0.05)
.16
±
.02 (4.0
±
0.5)
±
.08 (28.0
±
2.0)
.59
±
.02 (15.0
±
0.5)
.031
±
.002 (0.80
±
0.05)
.20
±
.02 (5.0
±
0.5)
ORDERING INFORMATION
CF
1/8
1K
5%
NOTES
1. 1/4W available in Panasert (10Ω – 1 meg range standard).
2. Dimensions are for bulk packaged product only.
3. Tan body color introduced in 3rd quarter 1995.
4. Add “F” suffix to Type. Example “CFF”
Type
Wattage
Resistance
Tolerance
SEI Electronics Inc.
•
P.O. Box 58789
•
Raleigh, NC 27658-8789
•
Telephone: (919) 850-9500
•
FAX: (919) 850-9504
Toll Free: (888) SEI-SEI-SEI
•
www.seielect.com
•
email: marketing@seielect.com
•
ISO 9002 / QS 9000 Registered
Rev. 12/00
Page 32
Carbon Film Resistors
Performance Curves/Construction
PERFORMANCE CURVES
Temperature Coefficient (Typical)
Note: Typical T/C for 11-22M is -2,800 ppm/°C.
Derating Curve (Typical)
Current Noise (Typical)
Surface Temperature Rise vs. Load
CONSTRUCTION
1. COLOR BANDS. The resistors are
permanently color banded for resistance
value and tolerance in accordance with
EIA specifications.
2. HELIXING. The units are helixed to a
predetermined base to final value ratio to
obtain the best TCR, noise and stability
characteristics.
3. FILM. Carbon-film resistors have a
homogeneous film of pure carbon
deposited by a pyrolitic process at
carefully controlled temperatures.
4. SUBSTRATES. The substrates are of
a proprietary nonalkaline ceramic,
prepared and processed under exacting
conditions to guarantee the utmost in
uniformity and surface characteristics.
5. INSULATION. The resistors are
coated with multiple layers of a baked-on
fire-retardant synthetic resin which
provides the units with a high degree of
mechanical and electrical protection in
the most adverse operating conditions.
6. TERMINATIONS. Positive contact is
provided to the resistant element by
precision-made end caps. The lead wires
are attached by using proprietary welding
techniques.
SEI Electronics Inc.
•
P.O. Box 58789
•
Raleigh, NC 27658-8789
•
Telephone: (919) 850-9500
•
FAX: (919) 850-9504
Toll Free: (888) SEI-SEI-SEI
•
www.seielect.com
•
email: marketing@seielect.com
•
ISO 9002 / QS 9000 Registered
Rev. 07/98
Page 33
Carbon Film Resistors
Performance Curves/Notes
PERFORMANCE CURVES
Surface Temperature Rise vs. Load - Type CF
Surface Temperature Rise vs. Load - Type CFM
NOTES
SEI Electronics Inc.
•
P.O. Box 58789
•
Raleigh, NC 27658-8789
•
Telephone: (919) 850-9500
•
FAX: (919) 850-9504
Toll Free: (888) SEI-SEI-SEI
•
www.seielect.com
•
email: marketing@seielect.com
•
ISO 9002 / QS 9000 Registered
Rev. 07/98
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