Document Number: 50008
Revision 17-Nov-05
www.vishay.com
38
RWM
Vishay Sfernice
For technical questions, contact sfer@vishay.com
FEATURES
• High dissipation
• High reliability level
– Fire Proof – Great Mechanical Strength
– Excellent Endurance
– Good Environmental Protection
– Conformal Vitreous Enamel – All Welded Construction
• Low ohmic values
The performance of this series of professional resistors fully
meets the requirements of the following specifi cations:
– NF C 83-210-001
– CECC 40201-001
– BS - CECC 40201-002
DIMENSIONS in millimeters
Undergoes European Quality Insurance System (CECC)
Enamelled Wirewound Power Resistors
Axial Leads
RB59
RB61
RB57
RB57
RB60
RB60
RB58
RB58
–
–
–
JB
HB
–
KB
–
–
–
–
–
–
–
2.6 W
4.5 W
6 W
6 W
7 W
7 W
9.5 W
9.5 W
21 W
21 W
25.8 W
3 W
5 W
7 W
7 W
8 W
8 W
11 W
11 W
25 W
25 W
30 W
5.5 W
7 W
10 W
10 W
10 W
12 W
14 W
20 W
25 W
25 W
30 W
120 V
300 V
350 V
350 V
500 V
500 V
650 V
650 V
800 V
800 V
800 V
4.8 kΩ
–
18.8 kΩ
17.5 kΩ
–
31 kΩ
–
38 kΩ
25.6 kΩ
25.6 kΩ
21.3 kΩ
12 ± 1
22.1 ± 1
24.7 ± 1
18 ± 1
24.7 ± 1
33.7 ± 1
33.7 ± 1
45.8 ± 2
45.8 ± 2
63.8 ± 1
63.8 ± 1
5.5 ± 1
5.5 ± 1
7.4 ± 1.5
6.5 ± 1
7.4 ± 1.5
7.4 ± 1.5
7.4 ± 1.5
9.4 ± 1.5
9.4 ± 1.5
9.4 ± 1.5
9.4 ± 1.5
1
2
3
2.2
3
4
4
8
8
14
14
0.1 Ω
10 kΩ
0.1 Ω
16 kΩ
0.1 Ω
27 kΩ
0.1 Ω
39 kΩ
0.1 Ω
27 kΩ
0.33 Ω
36 kΩ
0.33 Ω
36 kΩ
0.47 Ω
62 kΩ
0.47 Ω
62 kΩ
0.68 Ω
100 kΩ
0.68 Ω
100 kΩ
0.1 Ω
10 kΩ
0.1 Ω
6.8 kΩ
0.15 Ω
10 kΩ
0.15 Ω
39 kΩ
–
0.33 Ω
15 kΩ
–
0.47 Ω
33 kΩ
–
–
–
RWM 4 x 10
RWM 4 x 22
RWM 5 x 26
RWM 6 x 22
RWM 8 x 26
RWM 6 x 34
RWM 8 x 34
RWM 8 x 45
RWM 10 x 45
RWM 10 x 64
RWM 10 x 65
VISHAY
SFERNICE
STYLES
DESIGNATIONS
CECC
40201
-001
NFC
83-210
-001
BS
CECC
40201
-002
POWER RATING
at
+ 70 °C
at
+ 25 °C
With
Surface
Temp.
≤ + 450 °C
Ohmic
Range in
Relation to
Tolerance
± 5 %
E24 Series
Qualified
Ohmic
Range
NF C
83-210
Limiting
Element
Voltage
Critical
Resis-
tance
AØ B
Weight
in g
DIMENSIONS
IN MM
TECHNICAL SPECIFICATIONS
As a result of more than 50 years of experience and continu-
ous improvements the RWM Series of resistors features
proven reliability in AC or DC applications.
The high quality of the RWM resides mainly in the use
of a proprietary VISHAY SFERNICE enamel fi red at high
temperature and free from any compound liable to corrode
the resistive wire
.
25 min. A 25 min.
Ø 0.8 ± 0.1
Ø B
www.vishay.com
39
RWM
Vishay Sfernice
Document Number: 50008
Revision 17-Nov-05
For technical questions, contact sfer@vishay.com
PERFORMANCE
TESTS
Short Time Overload
Temperature Cycling
Humidity (Steady State)
Terminal Strength
Load Life
CONDITIONS REQUIREMENTS
± (2 % + 0.1 Ω)
± (1 % + 0.05 Ω
)
± (5 % + 0.1 Ω
)
± (1 % + 0.05 Ω
)
± (5 % + 0.1 Ω
)
± (0.5% + 0.05 Ω)
±
(
0.5 % + 0.05 Ω)
±
(
0.5 % + 0.05 Ω)
±
(
0.1 % + 0.05 Ω)
±
(
1.5 % + 0.05 Ω)
10 Pr during 10 s.
25 °C ambient
– 55 °C + 200 °C
56 days
40 °C Ambient - R.H. 95 %
Tensile test: 20 N
2 successive bending
2 full rotations of 180°
1000 h at Pr
90/30 Cycle
25 °C ambient
CECC 40201
TYPICAL DRIFTS
OVERLOAD
Heavy overloads can be endured in the form of short pulses < 0.1 s. Particular requirements should be submitted to Vishay
Sfernice, specifying peak voltage, cycle and environmental conditions.
RECOMMENDATIONS FOR USE
Since these components are high dissipation power resistors, customers are advised to use a high melting point solder.
For low ohmic values, the measurement becomes critical and the connecting wires resistance is to be included. The value
is measured at 5mm from the resistor body.
Group Mounting
In a still atmosphere, a distance between axes equal to fi ve times the resistor’s diameter is recommended.
Cabinet Mounting
• Unventilated box: dissipation should be reduced (see dimensional drawing).
• Forced ventilation: if conditions are appropriate, dissipation may be doubled or even trebled.
• In any case: the surface temperature at the hottest point should not exceed 450 °C.
These aspects should be considered by the end user.
Enamelled Wirewound Power Resistors
Axial Leads
ELECTRICAL SPECIFICATIONS
Tolerance Standard ± 5 %
On request ± 1 % to ± 10 %
Temperature Coeffi cient + 75 ppm/°C typical
Dielectric Withstanding Voltage NF EN 140000 500 VRMS - 1 minute - 10 mA
Inductance non inductive (Ayrton-Perry)winding available
Document Number: 50008
Revision 17-Nov-05
www.vishay.com
40
RWM
Vishay Sfernice
For technical questions, contact sfer@vishay.com
POWER RATING CHART
TYPICAL TEMPERATURE RISE
HOT SPOT TEMPERATURE IN °C
400
300
200
100
0
RATED POWER IN WATTS
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
4 x 22
5 x 26 - 6 x 22
6 x 34
8 x 34
8 x 45
10 x 64
8 x 26
10 x 45
10 x 65
4 x 10
Enamelled Wirewound Power Resistors
Axial Leads
% RATED POWER
AMBIENT TEMPERATURE IN °C
0 25 100 200 300 350
0
25
50
75
100
116
8 x 45
NI OPTIONAL
MODEL
RWM
TOLERANCE
± 5 %
PACKAGING
SPECIAL
DESIGN
XXX
Method N°
Optional
OHMIC VALUESTYLE
1.6 kΩ
Custom items are
subject to extra
charge and min.
order.
Please see price list.
ORDERING INFORMATION
MARKING
Sfernice trademark, model and style, CECC style, if applicable (except for the smallest model due to lack of space: (4 x 10 or
RB 59), ohmic value, resistance tolerance, manufacturing date (year - month).
Optional
Non Inductive
Winding
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
