RoHS
POWER - NIKKOHM
20W, 50W Wire Wound Resistors
RH25C, RH25CN, RH50C, RH50CN
Features and Applications
Inductive (RH25C, RH50C), non-inductive (RH25CN, RH50CN) aluminum clad housed wire-wound resistors.
Cement molded resistors construction gives complete environmental protection and 250 deg C high
temperature operation.
Complete welding terminal construction.
Braking resistor and dumping resistor of the motor control, rush current protection, gate resistor, snubber
resistor.
Symbol
A
B
C
D
E
F
G
H
Weight
Dimensional Specifications (mm)
E
D
G
2-φ2.0
C
B
A
3.7+/-0.2
2
F
H
2-3.2X4 slot
RH25C, RH25CN
49.4±0.2
27.1+0.15-0.10
18.3±0.2
29.6±0.2
20.6±0.2
15.6±0.2
16±0.2
2.2±0.2
16.5gr
RH50C, RH50NC
70.6±0.2
49.3+0.15-0.10
39.7±0.2
29.6±0.2
20.6±0.2
15.6±0.2
16±0.2
2.2±0.2
35gr
Specifications
Type
Rated Watt Rated Watt
Heat Sink
Free Air
（Ｗ）
（Ｗ）
RH25C
20
8
RH25CN
20
8
RH50C
30, 50(1)
10
RH50CN
30, 50(1)
10
(1) Please see note (1) in next page.
Resistance
（ohm）
0.022-25K
0.1-10K
0.048-50K
0.2-20K
200ppm
0.022-0.09
0.048-0.09
-
TC Lower Limit
(±ppm/K)
100ppm
50ppm
0.1-0.976
1-19.6
0.1-0.976
1-19.6
0.1-0.976
1-19.6
0.2-0.976
1-19.6
30ppm
20-25K
20-10K
20-50K
20-20K
Ｔｏｌｅｒａｎｃｅ
（%）
±0.1(B), ±0.2(C),
±0.5(D), ±1.0(F)
±2.0(G), ±5.0(J)
Characteristics
Specifications
±0.5%
±0.5%
±0.2%
10Gohm
±1.0%
-55 to +250 deg C
-55 to +250 deg C
Short time overload
Heat shock
Dielectric strength
Insulation resistance
Load life
Operating temp. range
Storage temp. range
Test Condition
2000VAC, 60seconds, 2mA
Ordering Information
RH50C 51ohmB
RH25CN100ohmF
Type
RH50C
RH25CN
Resistance
51ohm
100ohm
Tolerance
0.1%(B)
1.0%(F)
Remarks
Inductive
Non-inductive
