RH
Vishay Sfernice
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
RH
A
D
F
Ø2
H
J
G
B
N
M
ØK
E
Q
ØP
L
MODEL AND
STYLE
A
B ± 0.2
D ± 0.2
E ± 0.5
F
G±1
H ± 0.7
J ± 0.5
Ø K ± 0.1
L max.
M ± 0.5
N ± 0.3
Ø P min.
Q
Weight in 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 ± 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
15.5
10.7
29.4
3.2
15
8
2.4
2.1
66.5 ± 1.4
28.6
ELECTRICAL SPECIFICATIONS
VISHAY SFERNICE MODEL AND STYLE
NF C 83-210 (CECC 40 203)
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
RH5
RE4
5W
4W
10 W
8W
4W
3.2 W
160 V
1000 V
0.01
Ω
12 kΩ
0.1
Ω
2.7 kΩ
1
Ω
0.1
Ω
0.1
Ω
0.01
Ω
0.01
Ω
0.01
Ω
0.008
Ω
RH10
RE1
10 W
8W
12.5 W
10 W
6W
4.8 W
250 V
1500 V
0.006
Ω
20 kΩ
0.1
Ω
4.99 kΩ
RH25
RE2
20 W
16 W
25 W
20 W
9W
7.2 W
550 V
2500 V
0.006
Ω
62 kΩ
0.1
Ω
11.8 kΩ
1
Ω
0.1
Ω
0.05
Ω
0.01
Ω
0.01
Ω
0.006
Ω
RH50
RE3
30 W
24 W
50 W
40 W
12 W
9.6 W
1285 V
2500 V
0.006
Ω
130 kΩ
0.1
Ω
33.2 kΩ
Rated Maximum Voltage (VRMS)
Dielectric Strength VRMS
Ohmic Range
Qualified Ohmic Range
VISHAY SFERNICE
NF C 83-210
E 96
E 96
E 96
E 48
E 24
E 12
± 0.1 %
± 0.5 %
±1%
±2%
±5%
± 10 %
Minimum Ohmic Values
in Relation to Tolerance
Undergoes European Quality Insurance System (CECC)
Document Number: 50013
Revision: 20-May-09
For technical questions, contact:
sfer@vishay.com
www.vishay.com
52
RH
Vishay Sfernice
Heatsink Encased Wirewound Power Resistors
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 Pr/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
Pn MIL
VISHAY
30 % of Pn SFERNICE
REQUIREMENTS
-
± (0.25 % + 0.05
Ω)
± (0.25 % + 0.05
Ω)
± (1 % + 0.05
Ω)
Ins. resistance
≥
1 GΩ
± (1 % + 0.05)
Ins. resistance
≥
100 MΩ
± (1 % + 0.05
Ω)
± 50 ppm/°C
± 25 ppm/°C
± (1 % + 0.05
Ω)
Ins. resistance
≥
1 GΩ
TYPICAL DRIFTS
-
± (0.1 % + 0.05
Ω)
± (0.1 % + 0.05
Ω)
± (0.1 % + 0.05
Ω)
± (0.5 % + 0.05
Ω)
± (0.5 % + 0.05
Ω)
± 15 ppm/°C
± (0.1 % + 0.05
Ω)
± (0.5 % + 0.05
Ω)
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
2.5 Pn
5 Pn
12 Pn
DURATION
10 s
5s
2s
POWER RATING CHART
TEMPERATURE RISE
HOT SPOT TEMPERATURE IN °C
100
200
50
%
RATED POWER
75
150
RH
50
100
25
50
RH
RH
5
10
RH
25
0
0
0
50
100
150
200
250
275 300
350
0
10
20
30
40
50
60
70
RATED POWER IN WATTS
(Mounted on heatsink chassis)
AMBIENT TEMPERATURE IN °C
MARKING
VISHAY SFERNICE trademark, model, style, CECC style (if
applicable) nominal resistance (in
Ω),
tolerance (in %),
manufacturing date.
PACKAGING
Bag of 10 units
www.vishay.com
53
For technical questions, contact:
sfer@vishay.com
Document Number: 50013
Revision: 20-May-09
RH
Heatsink Encased Wirewound Power Resistors
Vishay Sfernice
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 kΩ
680R0
= 680
Ω
20302
= 20.3 kΩ
88R88
= 88.88
Ω
...
TOLERANCE
D
= 0.5 %
F
=1%
G
=2%
J
=5%
PACKAGING
Standard Packaging:
S03 = Bag, 10 pieces
SPECIAL
As applicable
Ex
= HDX
Document Number: 50013
Revision: 20-May-09
For technical questions, contact:
sfer@vishay.com
www.vishay.com
54
Legal Disclaimer Notice
Vishay
Disclaimer
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.
Document Number: 91000
Revision: 18-Jul-08
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