RH
www.vishay.com
Vishay Sfernice
Heatsink Encased Wirewound Power Resistors
FEATURES
5 W to 50 W at 25 C
NF C 83-210
According to CECC 40 203
High stability < 0.05 % year
Low temperature coefficient typically 15 ppm/C
Wide range of values from 0.006 to 130 k
Termination = Sn/Ag/Cu
Material categorization: For definitions of compliance
please see www.vishay.com/doc?99912
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).
NF F 16101, 10/1988 and 16102, 04/1992: Not applicable (our parts contain less than 10 g of combustible materials).
DIMENSIONS in millimeters
RH
M
A
F
D
N
2
H
G
J B
K
P L
E
Q
B D E H J K L M N P WEIGHT
SERIES A
F G 1 Q
0.2 0.2 0.5 0.7 0.5 0.1 MAX. 0.5 0.3 MIN. g
RH5 28.5 1.5 12.5 11.3 16.3 6.8 1.5 8.5 6.2 16.4 2.4 8.9 4.3 1.6 2.1 25.3 1.5 4
RH10 35.5 1.5 15.9 14 19 7.9 1.5 11 7.9 20.6 2.4 11 5.6 2 2.1 30.6 1.5 6.4
RH25 49 1.3 19.8 18.3 28 11.1 1.5 14 9.9 27.5 3.2 15 8 2.4 2.1 44.6 1.3 16.1
RH50 70.2 1.4 21.4 39.7 50 11 1.2 14 10.7 29.4 3.2 15 8 2.4 2.1 66.5 1.4 28.6
STANDARD ELECTRICAL SPECIFICATIONS
RESISTANCE RATED POWER
TOLERANCE
MODEL RANGE P
25 C
%
W
RH5 0.01 to12K 10 0.5, 1, 2, 5
RH10 0.006 to 20K 12.5 0.5, 1, 2, 5
RH25 0.006 to 62K 25 0.5, 1, 2, 5
RH50 0.006 to 130K 50 0.5, 1, 2, 5
Revision: 24-Feb-14 Document Number: 50013
1
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
RH
www.vishay.com
Vishay Sfernice
TECHNICAL SPECIFICATIONS
VISHAY SFERNICE MODEL AND STYLE RH5 RH10 RH25 RH50
25 C 5W 10 W 20 W 30 W
POWER RATING MIL
Chassis Mounted Resistors Limits
70 C 4 W 8 W 16 W 24 W
2 25 C 10 W 12.5 W 25 W 50 W
413 cm for RH5 and RH10 Vishay Sfernice
2
536 cm for RH25 and RH50 Limits
70 C 8 W 10 W 20 W 40 W
25 C 4 W 6 W 9W 12 W
Vishay Sfernice
Unmounted Resistors
Limits
70 C 3.2 W 4.8 W 7.2 W 9.6 W
Rated Maximum Voltage (V ) 160 V 250 V 550 V 1285 V
RMS
Dielectric Strength V 1000 V 1500 V 2500 V 2500 V
RMS
0.01 0.006 0.006 0.006
Vishay Sfernice
12 k 20 k 62 k 130 k
E 96 0.1 % 1 1
E 96 0.5 % 0.1 0.1
E 96 1 % 0.1 0.05
Minimum Ohmic Values
in Relation to Tolerance
E 48 2 % 0.01 0.01
E 24 5 % 0.01 0.01
E 12 10 % 0.01 0.008 0.006
PERFORMANCE
MIL-R-18546 D NF C 83-210
TYPICAL DRIFTS
TESTS CONDITIONS REQUIREMENTS
Operating Temperature Range - 55 C + 200 C - -
Momentary Overload 5 P /5 s (0.25 % + 0.05 ) (0.1 % + 0.05 )
r
- 55 C + 200 C
Climatic Sequence (0.25 % + 0.05 ) (0.1 % + 0.05 )
5 cycles
Load Life Test at High (1 % + 0.05 )
2 h at + 275 C (0.1 % + 0.05 )
Temperature Ins. resistance 1 G
(1 % + 0.05)
Humidity (Steady State) 56 days (0.5 % + 0.05 )
Ins. resistance 100 M
Climatic sequences test, with load
Resistance to Moisture (1 % + 0.05 ) (0.5 % + 0.05 )
and polarisation
5 to 10 50 ppm/C
Temperature Coefficient 15 ppm/C
> 10 25 ppm/C
1000 h 25 C P MIL Vishay (1 % + 0.05 ) (0.1 % + 0.05 )
Load Life n
at Maximum Temperature
200 C 30 % of P Sfernice Ins. resistance 1 G (0.5 % + 0.05 )
n
MOMENTARY OVERLOAD
1. Momentary overload (> 2 s):
See example in table below. In all cases, it should be understood that:
- The 12 P overload applies only to ohmic values 0.1.
n
- 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 DURATION
2.5 P 10 s
n
5 P 5 s
n
12 P 2 s
n
Revision: 24-Feb-14 Document Number: 50013
2
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