LEADED RESISTORS
Carbon Film Resistors
General Type
Normal & Miniature Style [ CFR Series ]
FEATURES
Power Rating
Resistance Tolerance
T.C.R.
1/6W, 1/4W, 1/2W, 1W, 2W, 3W
±2%, ±5%
see Table 1
DERATING CURVE
For resistors operated in ambient temperatures above 70°C, power rating must be derated
INTRODUCTION
in accordance with the curve below.
The CFR Series Carbon Film Resistors are
Rated Load (%)
100
70
155 °C
manufactured by coating a homogeneous
film of pure carbon on high grade ceramic
rods. After a helical groove has been cut in
the resistive layer, tinned connecting leads of
80
60
40
20
electrolytic copper are welded to the end-caps.
The resistors are coated with layers of tan
20
40
60
80
100 120 140 160
Ambient Temperature (°C)
color lacquer.
TABLE 1 TEMPERATURE COEFFICIENT
STYLE
MAX. VALUE OF TEMP. COEFFICIENT PPM/°C
under 100K Ω
100K Ω - 1M Ω
1M Ω - 10M Ω
CFR100, CFR200, CFR2WS, CFR3WS
CFR-12, CFR-25, CFR-50,
CFR25S, CFR50S, CFR1WS
±350
+350 / -500
-500
-700
-1,500
-1,500
DIMENSIONS
STYLE
DIMENSION
Unit: mm
Normal
Miniature
L
?D
H
?d
?d
CFR-12
CFR-25
CFR25S
CFR50S
3.4±0.3
6.3±0.5
1.9±0.2
2.4±0.2
28±2.0
28±2.0
0.45±0.05
0.55±0.05
H
L
?D
CFR-50
CFR1WS
9.0±0.5
3.3±0.3
26±2.0
0.55±0.05
CFR100
CFR200
CFR2WS
CFR3WS
11.5±1.0
15.5±1.0
4.5±0.5
5.0±0.5
35±2.0
33±2.0
0.8±0.05
0.8±0.05
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