C&H Technology SH User Manual
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Suite 108
Minnetonka, MN 55345
www.chtechnology.com
Phone (952) 933-6190
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1-800-274-4284
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Please contact the C&H Technology team for the following questions -
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www.chtechnology.com - SPECIALISTS IN POWER ELECTRONIC COMPONENTS AND ASSEMBLIES - www.chtechnology.com
SH
Vishay Sfernice
Heatsink Encased Wirewound Power Resistors
Industrial Applications
FEATURES
•≤ 50 Watt at + 25 °C
• High power characteristics
• Utilize heatsink capability
• Good mechanical protection
• Industrialized product
Built for high power dissipation applications, these components have very good overall characteristics for industrial use under
harsh environmental conditions.
DIMENSIONS in millimeters
RoHS
COMPLIANT
Ø K
MODEL AND
SH
A
D
E
Q
F
Ø 2
J
Ø P
M
N
H
B
G
L
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
SH5 SH10 SH25 SH50
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
9.9A
27.5
3.2
15
8
2.4
2.1
70.2 ± 1.4
21.4
39.7
15.5
10.7
29.4
3.2
15
8
2.4
2.1
ELECTRICAL SPECIFICATIONS
VISHAY SFERNICE MODEL AND STYLE SH5 SH10 SH25 SH50
Chassis mounted resistors: 413 cm2 for SH5 and SH10
Power Rat in g
Ohmic Value
Tolerance ± 5 %
Rated Maximum Voltage 160 V 250 V 550 V 1285 V
Dielectric Strength VRMS 800 V 1000 V 2000 V 2000 V
Insulation Resistance > 10
Temperature Coefficient ± 50 ppm/°C Rn > 50 Ω
Climatic Category 55/200/56
Temperature Limits - 55 °C + 200 °C
2
536 cm
Unmounted resistors at
for SH25 and SH50
25 °C 10 W 12.5 W 25 W 50 W
at
70 °C 8 W 10 W 20 W 40 W
25 °C 4 W 6 W 9 W 12 W
70 °C 3.2 W 4.8 W 7.2 W 9.6 W
0.1 Ω
3.3 kΩ
0.1 Ω
15 kΩ
4
MΩ > 3.104 MΩ
0.1 Ω
33 kΩ
0.1 Ω
51 kΩ
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 50014
54 Revision: 07-Dec-06
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