RWM
Vishay Sfernice
Enamelled Wirewound Power Resistors
Axial Leads
FEATURES
•
High dissipation up to 30 W (25 °C)
•
Fire Proof
•
Excellent Endurance typical drift ± 1.5 % after
1000 hours
•
Conformal Vitreous Enamel
•
All Welded Construction
•
Low ohmic values 0.1
Ω
available
•
Termination: Sn/Ag/Cu
As a result of more than 50 years of experience and
continuous 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 fired at high
temperature and free from any compound liable to corrode
the resistive wire.
RoHS
COMPLIANT
The performance of this series of professional resistors fully
meets the requirements of the following specifications:
– NF C 83-210-001
– CECC 40201-001
– BS - CECC 40201-002
DIMENSIONS
in millimeters
25 min.
A
25 min.
ØB
Ø 0.8 ± 0.1
TECHNICAL SPECIFICATIONS
DESIGNATIONS
VISHAY
SFERNICE
STYLES
CECC
40201
-001
RB59
RB61
RB57
RB57
RB60
RB60
RB58
RB58
-
-
-
Ohmic
Qualified
Range in
Relation to Ohmic Limiting Critical
With
Range Element Resis-
CECC
Tolerance
at
at
Surface
NF C
Voltage tance
40201
±5%
Temp.
83-210
-002 + 70 °C + 25 °C
≤
+ 450 °C E24 Series
POWER RATING
JB
HB
-
KB
-
LB
-
MB
-
-
-
2.6 W
4.5 W
6W
6W
7W
7W
9.5 W
9.5 W
21 W
21 W
25.8 W
3W
5W
7W
7W
8W
8W
11 W
11 W
25 W
25 W
30 W
5.5 W
7W
10 W
10 W
10 W
12 W
14 W
20 W
25 W
25 W
30 W
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
-
-
-
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
-
DIMENSIONS
IN mm
A
ØB
WEIGHT
IN g
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
12
± 1
22.1
± 1
5.5
± 1
5.5
± 1
1
2
3
2.2
3
4
4
8
8
14
14
18.8 kΩ 24.7
± 1
7.4
± 1.5
17.5 kΩ
-
31 kΩ
-
38 kΩ
18
± 1
6.5
± 1
24.7
± 1
7.4
± 1.5
33.7
± 1
7.4
± 1.5
33.7
± 1
7.4
± 1.5
45.8
± 2
9.4
± 1.5
25.6 kΩ 45.8
± 2
9.4
± 1.5
25.6 kΩ 63.8
± 1
9.4
± 1.5
21.3 kΩ 63.8
± 1
9.4
± 1.5
Undergoes European Quality Insurance System (CECC)
www.vishay.com
38
For technical questions, contact: sfer@vishay.com
Document Number: 50008
Revision: 30-Aug-07
RWM
Enamelled Wirewound Power Resistors
Axial Leads
PERFORMANCE
CECC 40201 - EN 140-201
TYPICAL DRIFTS
TESTS
Short Time Overload
CONDITIONS
10 Pr during 10 s
25 °C ambient
REQUIREMENTS
± (2 %
+ 0.1
Ω)
± (0.5 %
+ 0.05
Ω)
Vishay Sfernice
Temperature Cycling
- 55 °C + 200 °C
± (1 %
+ 0.05
Ω)
± (0.5 %
+ 0.05
Ω)
Humidity (Steady State)
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
± (5 %
+ 0.1
Ω)
± (0.5 %
+ 0.05
Ω)
Terminal Strength
± (1 %
+ 0.05
Ω)
± (0.1 %
+ 0.05
Ω)
Load Life
± (5 %
+ 0.1
Ω)
± (1.5 %
+ 0.05
Ω)
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.
Group Mounting
In a still atmosphere, a distance between axes equal to five
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.
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 5 mm from the resistor body.
ELECTRICAL SPECIFICATIONS
Tolerance
Standard
On request
Temperature Coefficient + 75 ppm/°C typical
Dielectric Withstanding Voltage NF EN 140000
Inductance
500 V
RMS
- 1 minute - 10 mA
non inductive (Ayrton-Perry) winding available
±5%
± 1 % and ± 2 %
Document Number: 50008
Revision: 30-Aug-07
For technical questions, contact: sfer@vishay.com
www.vishay.com
39
RWM
Vishay Sfernice
POWER RATING CHART
Enamelled Wirewound Power Resistors
Axial Leads
116
100
%
RATED POWER
75
50
25
0
0
25
100
200
AMBIENT TEMPERATURE IN °C
300
350
TYPICAL TEMPERATURE RISE
x2
10
4x
4x
-6
8x
6x
x
8
45
10
x
22
26
34
34
5
x4
2
x
10
64
HOT SPOT TEMPERATURE IN °C
300
200
5x
400
26
x
10
65
100
Optional
0
0
2
4
6
8
10
12
14
8
16
18
20
22
24
26
28
30
RATED POWER IN WATTS
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).
ORDERING INFORMATION
RWM
MODEL
4 x 10
STYLE
NI OPTIONAL
Non Inductive
Winding
XXX
SPECIAL
DESIGN
Method N°
Optional
150U
OHMIC VALUE
Custom items
are subject to
extra charge and
min. order.
Please see price list.
±5%
TOLERANCE
AM500
PACKAGING
e1
LEAD
(Pb)-FREE
SAP PART NUMBERING GUIDELINES
RWM
MODEL
0410
STYLE
1500
OHMIC VALUE
J
TOLERANCE
A20
PACKAGING
E1
LEAD (Pb)-FREE
www.vishay.com
40
For technical questions, contact: sfer@vishay.com
Document Number: 50008
Revision: 30-Aug-07
Legal Disclaimer Notice
Vishay
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.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1
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