LEADED RESISTORS
Melf Metal Film Resistors
General Type
Normal & Miniature Style [ MMF Series ]
FEATURES
Power Rating
Resistance Tolerance
T.C.R.
DERATING CURVE
1/6W, 1/4W, 0.4W, 1/2W, 0.6W, 1W
±0.1%, ±0.25%, ±0.5%, ±1%, ±2%, ±5%
±15ppm/°C, ±25ppm/°C, ±50ppm/°C, ±100ppm/°C, ±200ppm/°C
INTRODUCTION
For resistors operated in ambient temperatures above 70°C, power rating must be derated
in accordance with the curve below.
The MMF Series Melf Metal Film Resistors are
manufactured using a vacuum sputtering system
Rated Load (%)
100
70
155 °C
to deposit multiple layers of mixed metal
alloys and passivative materials onto a carefully
treated high grade ceramic substrate. After
a helical groove has been cut in the resistive
80
60
40
20
layer, SMD enabled structure. The resistors are
coated with layers of blue color lacquer.
20
40
60
80
100 120 140 160
Ambient Temperature (°C)
DIMENSIONS
STYLE
DIMENSION
Unit: mm
D
Normal
MMF-12
Miniature
MMF25S / MMF204
L
3.50±0.2
D
1.40±0.15
C Min.
0.5
C
L
MMF-25
MMF-50
MMF50S / MMF207
MMF1WS
5.90±0.2
8.50±0.2
2.20±0.1
3.20±0.2
0.5
0.5
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