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 Ω to 130 kΩ
• 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
A
D
M
F
N
Ø2
H
G B
J
ØK
L
ØP
E
Q
A
B±
0.2
D±
0.2
E±
0.5
RH5
28.5 ± 1.5
12.5
11.3
RH10
35.5 ± 1.5
15.9
14
RH25
49 ± 1.3
19.8
RH50
70.2 ± 1.4
21.4
SERIES
H±
0.7
F
G±1
16.3
6.8 ± 1.5
8.5
6.2
19
7.9 ± 1.5
11
7.9
18.3
28
11.1 ± 1.5
14
9.9
39.7
50
11 ± 1.2
14
10.7
J±
0.5
ØK±
0.1
L
MAX.
M±
0.5
N±
0.3
16.4
2.4
20.6
2.4
27.5
29.4
ØP
MIN.
8.9
4.3
1.6
2.1
25.3 ± 1.5
4
11
5.6
2
2.1
30.6 ± 1.5
6.4
3.2
15
8
2.4
2.1
44.6 ± 1.3
16.1
3.2
15
8
2.4
2.1
66.5 ± 1.4
28.6
Q
WEIGHT
g
OHMIC RANGE IN RELATION TO TOLERANCE
RH5
RH10
RH25
RH50
10 %
E24
0.01 Ω to 12 kΩ
0.006 Ω to 20 kΩ
0.006 Ω to 62 kΩ
0.006 Ω to 130 kΩ
5%
E24
0.01 Ω to 12 kΩ
0.01 Ω to 20 kΩ
0.01 Ω to 62 kΩ
0.01 Ω to 130 kΩ
2%
E48
0.01 Ω to 12 kΩ
0.01 Ω to 20 kΩ
0.01 Ω to 62 kΩ
0.01 Ω to 130 kΩ
1%
E96
0.1 Ω to 12 kΩ
0.1 Ω to 20 kΩ
0.05 Ω to 62 kΩ
0.05 Ω to 130 kΩ
0.5 %
E96
0.1 Ω to 12 kΩ
0.1 Ω to 20 kΩ
0.1 Ω to 62 kΩ
0.1 Ω to 130 kΩ
Revision: 07-Dec-15
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
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
RATED POWER
P25 °C
W
VOLTAGE LIMIT
VRMS
10
RH5
TOLERANCE
±%
RESISTANCE
RANGE
Ω
2, 5, 10
0.01 to 12K
160
10
0.5, 1
0.1 to 12K
10
0.006 to 20K
12.5
RH10
12.5
250
2, 5
0.01 to 20K
0.5, 1
0.1 to 20K
25
10
0.006 to 62K
25
2, 5
0.01 to 62K
1
0.05 to 62K
12.5
RH25
RH50
550
25
25
0.5
0.1 to 62K
50
10
0.006 to 130K
50
1285
50
50
2, 5
0.01 to 130K
1
0.05 to 130K
0.5
0.1 to 130K
TEMPERATURE
COEFFICIENT
± ppm/°C
< 5 Ω ± 100,
5 Ω to 10 Ω ± 50,
> 10 Ω ± 25
TECHNICAL SPECIFICATIONS
VISHAY SFERNICE MODEL AND STYLE
Power Rating
Chassis Mounted Resistors
413 cm2 for RH5 and RH10
536 cm2 for RH25 and RH50
Unmounted Resistors
RH5
RH10
RH25
MIL
Limits
25 °C
5W
10 W
20 W
RH50
30 W
70 °C
4W
8W
16 W
24 W
Vishay Sfernice
Limits
25 °C
10 W
12.5 W
25 W
50 W
70 °C
8W
10 W
20 W
40 W
Vishay Sfernice
Limits
25 °C
4W
6W
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
PERFORMANCE
MIL-R-18546 D
NF C 83-210
CONDITIONS
Operating Temperature Range
-55 °C +200 °C
-
-
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 Ω to 10 Ω
> 10 Ω
± 50 ppm/°C
± 25 ppm/°C
± 15 ppm/°C
Momentary Overload
Load Life
at Maximum Temperature
Revision: 07-Dec-15
1000 h 25 °C
200 °C
PnMIL
30 % of Pn
REQUIREMENTS
TYPICAL DRIFTS
TESTS
Vishay
Sfernice
± (1 % + 0.05 Ω)
± (0.1 % + 0.05 Ω)
Ins. resistance ≥ 1 GΩ
± (0.5 % + 0.05 Ω)
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
RH
www.vishay.com
Vishay Sfernice
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 LOADING
DURATION
2.5 Pn
10 s
5 Pn
5s
12 Pn
2s
POWER RATING
TEMPERATURE RISE
250
HOT SPOT TEMPERATURE IN °C
125
200
50
RH
150
75
100
25
0
50
100
150
200
250 275 300
RH
10
50
0
0
25
350
RH
5
50
RH
RATED POWER IN %
100
0
10
20
30
40
50
60
70
RATED POWER IN W
(Mounted on heatsink chassis)
AMBIENT TEMPERATURE IN °C
MARKING
PACKAGING
Vishay Sfernice trademark, model, style, nominal resistance
(in Ω), tolerance (in %), manufacturing date.
Bag of 10 units
ORDERING INFORMATION
RH
05
N
18R00
J
S03
MODEL
STYLE
NON INDUCTIVE
WINDING
Optional
OHMIC VALUE
TOLERANCE
PACKAGING
GLOBAL PART NUMBER INFORMATION
R
GLOBAL
MODEL
RH
H
5
0
3
3
0
0
1
J
S
0
3
SIZE
OPTION
OHMIC VALUE
TOLERANCE
PACKAGING
SPECIAL
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
20301 = 20.3 kΩ
88R88 = 88.88 Ω
...
D = 0.5 %
F=1%
G=2%
J=5%
K = 10 %
Standard Packaging:
S03 = Bag, 10 pieces
As applicable
Ex = HDX
Revision: 07-Dec-15
Document Number: 50013
3
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
RELATED DOCUMENTS
APPLICATION NOTES
Potentiometers and Trimmers
www.vishay.com/doc?51001
Guidelines for Vishay Sfernice Resistive and Inductive Components
www.vishay.com/doc?52029
Revision: 07-Dec-15
Document Number: 50013
4
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
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
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“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
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about the suitability of products for a particular application. It is the customer's responsibility to validate that a particular product
with the properties described in the product specification is suitable for use in a particular application. Parameters provided in
datasheets and / or specifications may vary in different applications and performance may vary over time. All operating
parameters, including typical parameters, must be validated for each customer application by the customer's technical experts.
Product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited
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Revision: 01-Jan-2023
1
Document Number: 91000
