
Heatsink Encased Wirewound Power Resistors
Industrial Applications
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 50014
54 Revision: 07-Dec-06
SH
Vishay Sfernice
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
SH
D
A
N
M
F
Ø 2
Ø K
Ø P
E
Q
L
G
H
B
J
MODEL AND
STYLE
SH5 SH10 SH25 SH50
A
B ± 0.2
D ± 0.2
28.5 ± 1.5
12.5
11.3
35 ± 1.5
15.9
14
49 ± 1.3
19.8
18.3
70.2 ± 1.4
21.4
39.7
E ± 0.5
F
16.3
6.8 ± 1.5
19
7.9 ± 1.5
28
11.1 ± 1.5
50
11 ± 1.2
G ± 1
H ± 0.7
8.5
6.2
11
7.9
14
9.9A
15.5
10.7
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
N ± 0.3
Ø P min.
1.6
2.1
2
2.1
2.4
2.1
2.4
2.1
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
ELECTRICAL SPECIFICATIONS
VISHAY SFERNICE MODEL AND STYLE SH5 SH10 SH25 SH50
Power Rating
Chassis mounted resistors: 413 cm
2
for SH5 and SH10
536 cm
2
for SH25 and SH50
at
25 °C 10 W 12.5 W 25 W 50 W
70 °C 8 W 10 W 20 W 40 W
Unmounted resistors at
25 °C 4 W 6 W 9 W 12 W
70 °C 3.2 W 4.8 W 7.2 W 9.6 W
Ohmic Value
0.1 Ω
3.3 kΩ
0.1 Ω
15 kΩ
0.1 Ω
33 kΩ
0.1 Ω
51 kΩ
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
4
MΩ > 3.10
4
MΩ
Temperature Coefficient ± 50 ppm/°C Rn > 50 Ω
Climatic Category 55/200/56
Temperature Limits - 55 °C + 200 °C
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