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RH
www.vishay.com
TECHNICAL SPECIFICATIONS
Vishay Sfernice
VISHAY SFERNICE MODEL AND STYLE
RH5
RH10
RH25
RH50
POWER RATING ?
Chassis Mounted Resistors
413 cm 2 for RH5 and RH10 ?
536 cm 2 for RH25 and RH50
Unmounted Resistors
MIL
Limits
Vishay Sfernice
Limits
Vishay Sfernice
Limits
25 °C
70 °C
25 °C
70 °C
25 °C
70 °C
5W
4W
10 W
8W
4W
3.2 W
10 W
8W
12.5 W
10 W
6W
4.8 W
20 W
16 W
25 W
20 W
9W
7.2 W
30 W
24 W
50 W
40 W
12 W
9.6 W
Rated Maximum Voltage (V RMS )
Dielectric Strength V RMS
Vishay Sfernice
E 96
± 0.1 %
E 96
± 0.5 %
160 V
1000 V
0.01 ?
12 k ?
1 ?
0.1 ?
250 V
1500 V
0.006 ?
20 k ?
550 V
2500 V
0.006 ?
62 k ?
1 ?
0.1 ?
1285 V
2500 V
0.006 ?
130 k ?
Minimum Ohmic Values ?
in Relation to Tolerance
E 96
E 48
E 24
±1%
±2%
±5%
0.1 ?
0.01 ?
0.01 ?
0.05 ?
0.01 ?
0.01 ?
E 12
± 10 %
0.01 ?
0.008 ?
0.006 ?
PERFORMANCE
TESTS
MIL-R-18546 D
NF C 83-210
CONDITIONS
REQUIREMENTS
TYPICAL DRIFTS
Operating Temperature Range
Momentary Overload
Climatic Sequence
Load Life Test at High ?
Temperature
Humidity (Steady State)
Resistance to Moisture
Temperature Coefficient
- 55 °C + 200 °C
5 P r /5 s
- 55 °C + 200 °C
5 cycles
2 h at + 275 °C
56 days
Climatic sequences test, with load
and polarisation
5 ? to 10 ?
> 10 ?
-
± (0.25 % + 0.05 ? )
± (0.25 % + 0.05 ? )
± (1 % + 0.05 ? )
Ins. resistance ? 1 G ?
± (1 % + 0.05)
Ins. resistance ? 100 M ?
± (1 % + 0.05 ? )
± 50 ppm/°C
± 25 ppm/°C
-
± (0.1 % + 0.05 ? )
± (0.1 % + 0.05 ? )
± (0.1 % + 0.05 ? )
± (0.5 % + 0.05 ? )
± (0.5 % + 0.05 ? )
± 15 ppm/°C
Load Life ?
at Maximum Temperature
1000 h 25 °C
200 °C
P n MIL
30 % of P n
Vishay
Sfernice
± (1 % + 0.05 ? )
Ins. resistance ? 1 G ?
± (0.1 % + 0.05 ? )
± (0.5 % + 0.05 ? )
MOMENTARY OVERLOAD
1. Momentary overload (> 2 s): ?
See example in table below. In all cases, it should be understood that: ?
- The 12 P n overload applies only to ohmic values 0.1. ?
- The overload voltage shall not be higher than that used for the dielectric strength test (see Standard Electrical Specifications).
2. Short time overload (< 2 s): ?
For times shorter than 2 s, higher overloads can be sustained in some cases. Consult Vishay Sfernice.
POWER LOADING
2.5 P n
5 P n
12 P n
DURATION
10 s
5s
2s
Revision: 24-Feb-14
2
Document Number: 50013
For technical questions, contact: sferfixedresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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