LEADED RESISTORS
Carbon Film Resistors
Flame-Proof Type
Normal & Miniature Style [ FCR Series ]
FEATURES
Power Rating
Resistance Tolerance
T.C.R.
Flameproof Multi-layer Coating Meets
Flameproof Feature Meets Overload Test
DERATING CURVE
1/4W, 1/2W, 1W, 2W, 3W
±2%, ±5%
see Table 1
UL-94V-0
UL-1412
INTRODUCTION
The FCR Series Carbon Film Flame-Proof
For resistors operated in ambient temperatures above 70°C, power rating must be derated
in accordance with the curve below.
Resistors are manufactured by coating a
homogeneous film of pure carbon on high
Rated Load (%)
100
70
155 °C
grade ceramic rods. After a helical groove has
been cut in the resistive layer, tinned connecting
leads of electrolytic copper are welded to the
end-caps. The resistors are coated with layers
80
60
40
20
of gray color lacquer.
20
40
60
80
100 120 140 160
Ambient Temperature (°C)
TABLE 1 TEMPERATURE COEFFICIENT
STYLE
MAX. VALUE OF TEMP. COEFFICIENT PPM/°C
under 100K Ω
100K Ω - 1M Ω
1M Ω - 10M Ω
FCR100, FCR200, FCR2WS, FCR3WS
FCR-25, FCR-50, FCR50S, FCR1WS
±350
+350 / -500
-500
-700
-1,500
-1,500
DIMENSIONS
STYLE
DIMENSION
Unit: mm
Normal
Miniature
L
?D
H
?d
?d
FCR-25
FCR50S
6.3±0.5
2.4±0.2
28±2.0
0.55±0.05
H
L
th color code: black
?D
FCR-50
FCR100
FCR1WS
FCR2WS
9.0±0.5
11.5±1.0
3.3±0.3
4.5±0.5
26±2.0
35±2.0
0.55±0.05
0.8±0.05
FCR200
FCR3WS
15.5±1.0
5.0±0.5
33±2.0
0.8±0.05
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