RH
Vishay Sfernice
Heatsink Encased Wirewound Power Resistors
FEATURES
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5 Watt to 50 Watt at 25°C
MIL-R 18546 D and 1C
NF C 83-210
CECC 40 203
High stability < 0.05% year
Electrical insulation
Low temperature coefficient
Wide range of values
Encased in a compact and light heatsink offering complete environmental protection, great mechanical strength and easy
mounting. Non inductive versions can be supplied under the RHNI designation (please indicate required specifications and
frequency range upon ordering).
DIMENSIONS in millimeters
MODEL AND
RH50
RH5
RH10
RH25
RH
STYLE
M
A
D
A
28.5 ± 1.5
12.5
35 ± 1.5
15.9
49 ± 1.3
19.8
18.3
70.2 ± 1.4
21.4
B ± 0.2
F
N
D
± 0.2
11.3
14
39.7
28
E ± 0.5
F
16.3
6.8 ± 1.5
19
7.9 ± 1.5
50
11 ± 1.2
11.1 ± 1.5
Ø 2
G ± 1
8.5
6.2
11
14
15.5
10.7
H
H ± 0.7
7.9
9.9
J
G
B
J ± 0.5
Ø K ± 0.1
16.4
2.4
20.6
2.4
27.5
3.2
29.4
3.2
L max.
M ± 0.5
8.9
4.3
11
5.6
15
8
15
8
Ø K
N ± 0.3
Ø P min.
1.6
2.1
2
2.1
2.4
2.1
2.4
2.1
L
Ø P
E
Q
Q
25.3 ± 1.5
3
30.6 ± 1.5
8.8
44.6 ± 1.3 66.5 ± 1.4
Weight in g
16.5
30.8
ELECTRICAL SPECIFICATIONS
VISHAY SFERNICE MODEL AND STYLE
NF C 83-210 (CECC 40 203)
RH5
RH10
RH25
RH50
RE4
RE1
RE2
RE3
MIL-R-18546 D AND 1C
RE60
RE65
RE70
RE75
5W
4W
10W
8W
20W
16W
30W
24W
Chassis Mounted Resistors
25°C
70°C
MIL
Limits
413 cm2 for RH5 and RH10
25°C
70°C
10W
8W
12.5W
10W
25W
20W
50W
40W
VISHAY SFERNICE
Limits
536 cm2 for RH25 and RH50
Unmounted Resistors
25°C
70°C
4W
6W
9W
12W
9.6W
VISHAY SFERNICE
Limits
3.2W
160V
1000V
4.8W
250V
1500V
7.2W
550V
2500V
Rated Maximum Voltage (VRMS)
Dielectric Strength (RMS)
1285V
2500V
0.01Ω
12kΩ
0.006Ω
20kΩ
0.006Ω
62kΩ
0.006Ω
130 kΩ
Ohmic Range
VISHAY SFERNICE
0.1Ω
2.7kΩ
0.1Ω
4.99kΩ
0.1Ω
11.8kΩ
0.1Ω
33.2kΩ
Qualified Ohmic Range
NF C 83-210
E 96
E 96
E 96
E 48
E 24
E 12
0.1%
0.5%
1%
2%
5%
1Ω
1Ω
0.1Ω
0.1Ω
0.1Ω
0.01Ω
Minimum Ohmic Values
in Relation
to Tolerance
0.05Ω
0.01Ω
0.01Ω
0.01Ω
10%
0.006Ω
0.01Ω
0.008Ω
Undergoes European Quality Insurance System (CECC)
www.vishay.com
52
Document Number: 50013
Revision 13-Jan-04
For technical questions, contact sfer@vishay.com