C&H Technology RH User Manual
6121 Baker Road,
Suite 108
Minnetonka, MN 55345
www.chtechnology.com
Phone (952) 933-6190
Fax (952) 933-6223
1-800-274-4284
Thank you for downloading this document from C&H Technology, Inc.
Please contact the C&H Technology team for the following questions -
Technical
Application
Assembly
Availability
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Phone – 1-800-274-4284
E-Mail – sales@chtechnology.com
www.chtechnology.com - SPECIALISTS IN POWER ELECTRONIC COMPONENTS AND ASSEMBLIES - www.chtechnology.com
RH
Vishay Sfernice
Heatsink Encased Wirewound Power Resistors
FEATURES
• 5 Watt to 50 Watt at 25 °C
• NF C 83-210
• CECC 40 203
• High stability < 0.05 % year
• Low temperature coefficient typically ± 15 ppm/°C
• Wide range of values from 0.006 Ω to 130 kΩ
• Termination = Sn/Ag/Cu
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).
RoHS
COMPLIANT
DIMENSIONS in millimeters
Ø K
A
RH
D
E
Q
F
Ø 2
J
Ø P
M
N
H
B
G
L
MODEL AND
STYLE
A
B ± 0.2
D ± 0.2
E ± 0.5
F
G ± 1
H ± 0.7
J ± 0.5
Ø K ± 0.1
L max.
M ± 0.5
N ± 0.3
Ø P min.
Q 25.3 ± 1.5 30.6 ± 1.5 44.6 ± 1.3 66.5 ± 1.4
Weight in g 3 8.8 16.5 30.8
RH5 RH10 RH25 RH50
28.5 ± 1.5
12.5
11.3
16.3
6.8 ± 1.5197.9 ± 1.52811.1 ± 1.55011 ± 1.2
8.5
6.2
16.4
2.4
8.9
4.3
1.6
2.1
35 ± 1.5
15.9
14
11
7.9
20.6
2.4
11
5.6
2
2.1
49 ± 1.3
19.8
18.3
14
9.9
27.5
3.2
15
8
2.4
2.1
70.2 ± 1.4
ELECTRICAL SPECIFICATIONS
VISHAY SFERNICE MODEL AND STYLE RH5 RH10 RH25 RH50
NF C 83-210 (CECC 40 203) RE4 RE1 RE2 RE3
Chassis Mounted Resistors
2
413 cm
536 cm2 for RH25 and RH50
Power Rating
Unmounted Resistors
Rated Maximum Voltage (VRMS) 160 V 250 V 550 V 1285 V
Dielectric Strength VRMS 1000 V 1500 V 2500 V 2500 V
Ohmic Range VISHAY SFERNICE
Qualified Ohmic Range NF C 83-210
Minimum Ohmic Values
in Relation
to Tolerance
Undergoes European Quality Insurance System (CECC)
for RH5 and RH10
VISHAY SFERNICE
VISHAY SFERNICE
MIL
Limits
Limits
Limits
E 96 ± 0.1 % 1 Ω 1 Ω
E 96 ± 0.5 % 0.1 Ω 0.1 Ω
E 96 ± 1 % 0.1 Ω 0.05 Ω
E 48 ± 2 % 0.01 Ω 0.01 Ω
E 24 ± 5 % 0.01 Ω 0.01 Ω
E 12 ± 10 % 0.01 Ω 0.008 Ω 0.006 Ω
25 °C 5 W 10 W 20 W 30 W
70 °C 4 W 8 W 16 W 24 W
25 °C 10 W 12.5 W 25 W 50 W
70 °C 8 W 10 W 20 W 40 W
25 °C 4 W 6 W 9W 12 W
70 °C 3.2 W 4.8 W 7.2 W 9.6 W
0.01 Ω
12 kΩ
0.1 Ω
2.7 kΩ
0.006 Ω
20 kΩ
0.1 Ω
4.99 kΩ
0.006 Ω
62 kΩ
0.1 Ω
11.8 kΩ
0.006 Ω
130 kΩ
0.1 Ω
33.2 kΩ
21.4
39.7
15.5
10.7
29.4
3.2
15
8
2.4
2.1
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 50013
52 Revision: 07-Dec-06
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