Through-hole resisTors
Power Wirewound &
Vertical Lead Type
Fiberglass Cement Resistors
Normal & Miniature Style [ PSM Series ]
FeATures
Power Rating
ResistanceTolerance
T.C.R
4W, 5W, 7W, 9W, 11W, 17W
±5%, ±10%
±10ppm/°C, ±40ppm/°C, 400±50ppm/°C
DerATiNg CurVe
For resistors operated in ambient temperatures above 70°C, power rating must be derated
in accordance with the curve below.
iNTroDuCTioN
The PSM Series Resistors are wound on
Fiberglass core. The materials used and the
construction techniques ensure excellent
flame resistance, arc resistance and moisture
resistance as well as self-extinguishing
capabilities. They will withstand the most
rigorous loading test.
70
350 °C
Rated Load (%)
100
80
60
40
20
0
Ambient Temperature (°C)
-50
0
50 100 150 200 250 300 350
As resistors in radio and television receivers,
hazardous conditions such as smoking and
redheat can be completely prevented by the
proper choice of power resistors.
DiMeNsioNs
Unit: mm
sTYle
DiMeNsioN
Nꢀꢁmaꢂ
Mꢃnꢃatꢄꢁꢅ
l
W
h
ød
max.1.5
32±3
W
L
PSM400
PSM500
-
-
20±1.0
25±1.0
25±1.0
38±1.0
38±1.0
50±1.5
75±2.0
7.0±0.5
7.0±0.5
9.0±0.4
7.0±0.5
9.0±0.4
9.0±0.4
9.0±0.4
8.0±0.4
8.0±0.4
10.0±0.4
8.0±0.4
10.0±0.4
10.0±0.4
10.0±0.4
0.8±0.02
0.8±0.02
0.8±0.02
0.8±0.02
0.8±0.02
0.8±0.02
0.8±0.02
ød
-
W
*
PSM7WS
H
H
PSM700
PSM900
PSM11A
PSM17A
-
-
-
-
PSM400-700
PSM7WS/17A
* 6mm, reduced solderability in this area