RH
Vishay Sfernice
Document Number: 50013 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 20-May-09 52
Heatsink Encased Wirewound Power Resistors
FEATURES
•5 W to 50 W 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
•Compliant to RoHS directive 2002/95/EC
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
Undergoes European Quality Insurance System (CECC)
D
A
N
M
F
Ø 2
Ø K
Ø P
E
Q
L
G
H
B
J
RH
MODEL AND
STYLE RH5 RH10 RH25 RH50
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
F16.3
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
9.9 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
815
8
N ± 0.3
Ø P min. 1.6
2.1 2
2.1 2.4
2.1 2.4
2.1
Q25.3 ± 1.5 30.6 ± 1.5 44.6 ± 1.3 66.5 ± 1.4
Weight in g 4 6.4 16.1 28.6
ELECTRICAL SPECIFICATIONS
VISHAY SFERNICE MODEL AND STYLE RH5 RH10 RH25 RH50
NF C 83-210 (CECC 40 203) RE4 RE1 RE2 RE3
Power Rating
Chassis Mounted Resistors MIL
Limits
25 °C 5 W 10 W 20 W 30 W
70 °C 4 W 8 W 16 W 24 W
413 cm2 for RH5 and RH10
536 cm2 for RH25 and RH50
VISHAY SFERNICE
Limits
25 °C 10 W 12.5 W 25 W 50 W
70 °C 8 W 10 W 20 W 40 W
Unmounted Resistors VISHAY SFERNICE
Limits
25 °C 4 W 6 W 9W 12 W
70 °C 3.2 W 4.8 W 7.2 W 9.6 W
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 0.01 Ω
12 kΩ
0.006 Ω
20 kΩ
0.006 Ω
62 kΩ
0.006 Ω
130 kΩ
Qualified Ohmic Range NF C 83-210 0.1 Ω
2.7 kΩ
0.1 Ω
4.99 kΩ
0.1 Ω
11.8 kΩ
0.1 Ω
33.2 kΩ
Minimum Ohmic Values
in Relation to Tolerance
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
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 50013
53 Revision: 20-May-09
RH
Vishay Sfernice Heatsink Encased Wirewound Power Resistors
MOMENTARY OVERLOAD
1. Momentary overload (> 2 s):
See example in table below. In all cases, it should be understood that:
- The 12 Pn 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 RATING CHART
MARKING
VISHAY SFERNICE trademark, model, style, CECC style (if
applicable) nominal resistance (in Ω), tolerance (in %),
manufacturing date.
TEMPERATURE RISE
PACKAGING
Bag of 10 units
PERFORMANCE
MIL-R-18546 D NF C 83-210 TYPICAL DRIFTS
TESTS CONDITIONS REQUIREMENTS
Operating Temperature Range - 55 °C + 200 °C - -
Momentary Overload 5 Pr/5 s ± (0.25 % + 0.05 Ω) ± (0.1 % + 0.05 Ω)
Climatic Sequence - 55 °C + 200 °C
5 cycles ± (0.25 % + 0.05 Ω) ± (0.1 % + 0.05 Ω)
Load Life Test at High
Temperature 2 h at + 275 °C ± (1 % + 0.05 Ω)
Ins. resistance ≥ 1 GΩ ± (0.1 % + 0.05 Ω)
Humidity (Steady State) 56 days ± (1 % + 0.05)
Ins. resistance ≥ 100 MΩ ± (0.5 % + 0.05 Ω)
Resistance to Moisture Climatic sequences test, with load
and polarisation ± (1 % + 0.05 Ω) ± (0.5 % + 0.05 Ω)
Temperature Coefficient 5 to 10
> 10
± 50 ppm/°C
± 25 ppm/°C ± 15 ppm/°C
Load Life
at Maximum Temperature
1000 h 25 °C Pn MIL VISHAY ± (1 % + 0.05 Ω) ± (0.1 % + 0.05 Ω)
200 °C 30 % of Pn SFERNICE Ins. resistance ≥ 1 GΩ ± (0.5 % + 0.05 Ω)
POWER LOADING DURATION
2.5 Pn 10 s
5 Pn 5 s
12 Pn 2 s
AMBIENT TEMPERATURE IN °C
REWOP
DET
AR
%
100
75
50
25
0 0 50 100 150 200 250 275 300 350
RATED POWER IN WATTS
(
Mounted on heatsink chassis
)
C
°
N I
E
R U T A
R
E P M
E
T
T
O
P
S
T O H
200
150
100
50
0
0 10 20 30 40 50 60 70
H
R 0
1
H R 5
H
R 5 2
0 5
H R
Document Number: 50013 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 20-May-09 54
RH
Heatsink Encased Wirewound Power Resistors Vishay Sfernice
ORDERING INFORMATION
RH 05 N 18R00 J S03
MODEL STYLE NON INDUCTIVE
WINDING
Optional
OHMIC VALUE TOLERANCE PACKAGING
GLOBAL PART NUMBER INFORMATION
GLOBAL
MODEL SIZE OPTION OHMIC VALUE TOLERANCE PACKAGING SPECIAL
RH 05
10
25
50
N = Non inductive winding The first four digits are
significant figures and the
last digit specifies the
number of zeros to follow.
R designates decimal point.
33001 = 33 kΩ
680R0 = 680 Ω
20302 = 20.3 kΩ
88R88 = 88.88 Ω
...
D = 0.5 %
F = 1 %
G = 2 %
J = 5 %
Standard Packaging:
S03 = Bag, 10 pieces
As applicable
Ex = HDX
5033001 SR H J03
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
Disclaimer
Legal Disclaimer Notice
Vishay
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
