LEADED RESISTORS
Melf Carbon Film Resistors
General Type
Normal & Miniature Style [ MCF Series ]
FEATURES
Power Rating
Resistance Tolerance
T.C.R.
1/6W, 1/4W, 0.4W, 1/2W, 0.6W, 1W
±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 MCF Series Melf Carbon Film Resistors
Rated Load (%)
100
70
155 °C
are 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
electrolytic copper are welded to the end-caps.
80
60
40
20
SMD enabled structure. The resistors are
20
40
60
80
100 120 140 160
Ambient Temperature (°C)
coated with layers of lacquer.
TABLE 1 TEMPERATURE COEFFICIENT
STYLE
MAX. VALUE OF TEMP. COEFFICIENT PPM/°C
MCF-12, MCF25S, MCF204 under 1K Ω
1K1 Ω -47K Ω
51K Ω -470K Ω 510K Ω -1M Ω
0 to -350
0 to -600
0 to -1,000
0 to -1,500
MCF-25, MCF50S, MCF207, under 10K Ω 11K Ω -150K Ω
160K Ω -2M2 Ω
MCF-50, MCF1WS
0 to -350
0 to -600
0 to -1,000
DIMENSIONS
STYLE
DIMENSION
Unit: mm
D
Normal
MCF-12
Miniature
MCF25S / MCF204
L
3.50±0.2
D
1.40±0.15
C Min.
0.5
C
L
MCF-25
MCF-50
MCF50S / MCF207
MCF1WS
5.90±0.2
8.50±0.2
2.20±0.1
3.20±0.2
0.5
0.5
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