Data Sheet

POWER - NIKKOHM
300W
CHASSIS MOUNTING NON-INDUCTIVE
HIGH POWER RESISTORS
RPM250, RPM300
Note: The depth of the screw hole is about 4.3mm from the surface of the terminal plate.
Dimensions
Features and Applications
Small size SOT227, light weight, 300W high power resistor install on air-cooled heat sink or water-cooling
is necessary.
Completely resin filled structure provides high insulation voltage between heat-sink / resistor and partial
discharge performance, long-life stable operation.
2.5kV insulation voltage is standard and 4.0 kV insulation is available in option.
Various 6 types of circuit configuration gives ease customer’s applications.
Very low series inductance and parallel capacitance make wide frequency range operation.
Applications include snubber resistors, filter resistors, bleeder resistor, current detect for automotive
electronics and many types of power electronics as UPS, power supply, professional audio.
RoHS
mm +/- mm
A 38.0 +/-0.2
B 25.0 +/-0.2
C 11.8 +/-0.5
D 4.2 +/-0.1
E 13.0 +/-0.3
F 15.0 +/-0.4
G 30.0 +/-0.1
H 10.0 +/-0.2
JM4
4-J 4-D
4-4R
A
G
F
4
1
3
2
H
B E
C
Schematics
RPM300
X
RPM300Y RPM300Z RPM250
X
RPM250Y RPM250Z
4 3
1 2
R2
R1
4 3
1 2
R2
R1
4 3
1 2
R3
R2
R1
4 3
1 2
R1
4 3
1 2
R1
4 3
1 2
R1
Case
Nikkohm Co., Ltd. 3-31-2640 Minamicho, Misawa, Aomori 033-0036 Japan TEL: [phone], FAX: [phone]
© Nikkohm Co., Ltd. All rights reserved. 2015. URL: http://www.nikkohm.co.jp & http://www.nikkohm.co.jp / e-mail: [e-mail]
11.8
(2.5)
(3.0)
(0.8)
10.0
8.0
+
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-
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2
8.7
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-
0
.
5
4.75
+
/
-
0
.
2
Dia. 4.50
Fillin
g
Resisto
r
Terminals
Conducto
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ALO substrate
Co
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