LEADED RESISTORS
Flame-Proof &
Wirewound Resistors
Non-Inductive Type
Normal & Miniature Style [ NKN Series ]
FEATURES
Power Rating
Resistance Tolerance
T.C.R.
Flameproof Multi-layer Coating Meets
Flameproof Feature Meets Overload Test
1/2W, 1W, 2W, 3W, 4W, 5W, 7W
±5%
±300ppm/°C
UL-94V-0
UL-1412
INTRODUCTION
The resistor element is a resistive wire which is
wound in a single layer on a ceramic rod, with
tinned connecting wires of electrolytic copper
DERATING CURVE
For resistors operated in ambient temperatures above 40°C, power rating must be derated
in accordance with the curve below.
welded to the end-caps. The ends of the
Rated Load (%)
100
40 70
200
275 °C
resistive wire and the leads are connected to
the caps by welding. The resistors are coated
with layers of green color flame-proof lacquer.
The 5th color band is black to represent NKN
series.
80
60
40
20
3W-7W
1/2W-3WS
50
100 150 200 250 300
Ambient Temperature (°C)
DIMENSIONS
STYLE
DIMENSION
Unit: mm
Normal
NKN-50
Miniature
NKN1WS
L
9.0±0.5
?D
3.3±0.3
H
26±2.0
?d
0.55±0.05
?d
NKN100
NKN2WS
11.5±1.0
4.5±0.5
35±2.0
0.8±0.05
H
L
th color code: black
?D
NKN200
NKN300
NKN400
NKN3WS
NKN5WS
15.5±1.0
17.5±1.0
5.0±0.5
6.5±0.5
33±2.0
32±2.0
0.8±0.05
0.8±0.05
NKN500
NKN7WS
24.5±1.0
8.0±0.5
38±2.0
0.8±0.05
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