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
A
D
F
N
M
Ø2
H
J
G
B
ØK
E
Q
ØP
L
SERIES
RH5
RH10
RH25
RH50
A
28.5 ± 1.5
35.5 ± 1.5
49 ± 1.3
70.2 ± 1.4
B±
0.2
12.5
15.9
19.8
21.4
D±
0.2
11.3
14
18.3
39.7
E±
0.5
16.3
19
28
50
F
6.8 ± 1.5
7.9 ± 1.5
11.1 ± 1.5
11 ± 1.2
G±1
8.5
11
14
14
H±
0.7
6.2
7.9
9.9
10.7
J±
0.5
16.4
20.6
27.5
29.4
ØK±
0.1
2.4
2.4
3.2
3.2
L
MAX.
8.9
11
15
15
M±
0.5
4.3
5.6
8
8
N±
0.3
1.6
2
2.4
2.4
ØP
MIN.
2.1
2.1
2.1
2.1
Q
25.3 ± 1.5
30.6 ± 1.5
44.6 ± 1.3
66.5 ± 1.4
WEIGHT
g
4
6.4
16.1
28.6
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
RH5
RH10
RH25
RH50
RESISTANCE
RANGE
0.01 to12K
0.006 to 20K
0.006 to 62K
0.006 to 130K
RATED POWER
P
25 °C
W
10
12.5
25
50
TOLERANCE
±%
0.5, 1, 2, 5
0.5, 1, 2, 5
0.5, 1, 2, 5
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
RH5
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
160 V
1000 V
Vishay Sfernice
E 96
E 96
± 0.1 %
± 0.5 %
±1%
±2%
±5%
± 10 %
0.01
0.01
12 k
1
0.1
0.1
0.01
0.01
0.008
RH10
10 W
8W
12.5 W
10 W
6W
4.8 W
250 V
1500 V
0.006
20 k
RH25
20 W
16 W
25 W
20 W
9W
7.2 W
550 V
2500 V
0.006
62 k
1
0.1
0.05
0.01
0.01
0.006
RH50
30 W
24 W
50 W
40 W
12 W
9.6 W
1285 V
2500 V
0.006
130 k
TECHNICAL SPECIFICATIONS
VISHAY SFERNICE MODEL AND STYLE
POWER RATING
Chassis Mounted Resistors
413 cm
2
for RH5 and RH10
536 cm
2
for RH25 and RH50
Unmounted Resistors
Rated Maximum Voltage (V
RMS
)
Dielectric Strength V
RMS
Minimum Ohmic Values
in Relation to Tolerance
E 96
E 48
E 24
E 12
PERFORMANCE
MIL-R-18546 D
TESTS
Operating Temperature Range
Momentary Overload
Climatic Sequence
Load Life Test at High
Temperature
Humidity (Steady State)
Resistance to Moisture
Temperature Coefficient
Load Life
at Maximum Temperature
1000 h 25 °C
200 °C
NF C 83-210
CONDITIONS
- 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
P
n
MIL
30 % of
P
n
Vishay
Sfernice
REQUIREMENTS
-
± (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
± (1 % + 0.05
)
Ins. resistance
1 G
TYPICAL DRIFTS
-
± (0.1 % + 0.05
)
± (0.1 % + 0.05
)
± (0.1 % + 0.05
)
± (0.5 % + 0.05
)
± (0.5 % + 0.05
)
± 15 ppm/°C
± (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
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
POWER RATING
125
Vishay Sfernice
TEMPERATURE RISE
250
RATED POWER IN %
100
HOT SPOT TEMPERATURE IN °C
200
RH
50
75
150
50
100
10
RH
25
RH
0
0
50
100
150
200
250 275 300
350
0
0
RH
10
25
50
5
20
30
40
50
60
70
AMBIENT TEMPERATURE IN °C
RATED POWER IN W
(Mounted on heatsink chassis)
MARKING
Vishay Sfernice trademark, model, style, nominal resistance
(in
),
tolerance (in %), manufacturing date.
PACKAGING
Bag of 10 units
ORDERING INFORMATION
RH
MODEL
05
STYLE
N
NON INDUCTIVE
WINDING
Optional
18R00
OHMIC VALUE
J
TOLERANCE
S03
PACKAGING
GLOBAL PART NUMBER INFORMATION
R
H
5
0
3
3
0
0
1
J
S
0
3
GLOBAL
MODEL
RH
SIZE
05
10
25
50
OPTION
N
= Non inductive winding
OHMIC VALUE
The first four digits are
significant figures and the
last digit specifies the
number of zeros to follow.
R designates decimal point.
33001
= 33 k
680R0
= 680
20301
= 20.3 k
88R88
= 88.88
...
TOLERANCE
D
= 0.5 %
F
=1%
G
=2%
J
=5%
PACKAGING
Standard Packaging:
S03 = Bag, 10 pieces
SPECIAL
As applicable
Ex
= HDX
Revision: 24-Feb-14
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
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.
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 in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
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 to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please
contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.
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. Product names and markings noted herein may be trademarks of their respective owners.
Material Category Policy
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the
definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council
of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free
requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference
to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21
conform to JEDEC JS709A standards.
Revision: 02-Oct-12
1
Document Number: 91000
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