RWM
www.vishay.com
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 h
• Conformal vitreous enamel
• All welded construction
• Low ohmic values 0.1
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.
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
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
RWM
4 x 10
A
ØB
Weight in g
12 ± 1
5.5 ± 1
1
RWM
4 x 22
22.1 ± 1
5.5 ± 1
2
RWM
5 x 26
24.7 ± 1
7.4 ± 1.5
3
RWM
6 x 22
18 ± 1
6.5 ± 1
2.2
RWM
8 x 26
24.7 ± 1
7.4 ± 1.5
3
RWM
6 x 34
33.7 ± 1
7.4 ± 1.5
4
RWM
8 x 34
33.7 ± 1
7.4 ± 1.5
4
RWM
8 x 45
45.8 ± 2
9.4 ± 1.5
8
RWM
10 x 45
45.8 ± 2
9.4 ± 1.5
8
RWM
10 x 64
63.8 ± 1
9.4 ± 1.5
14
RWM
10 x 65
63.8 ± 1
9.4 ± 1.5
14
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
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
SIZE
0410
0422
0526
0622
0826
0634
0834
0845
1045
1064
1065
RESISTANCE
RANGE
0.1 to 10K
0.1 to 16K
0.1 to 27K
0.1 to 39K
0.1 to 27K
0.33 to 36K
0.33 to 36K
0.47 to 62K
0.47 to 62K
0.68 to 100K
0.68 to 100K
RATED POWER
P
25 °C
W
3
5
7
7
8
8
11
11
25
25
30
LIMITING ELEMENT
VOLTAGE
V
120
300
350
350
500
500
650
650
800
800
800
TOLERANCE
±%
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
Revison: 13-Oct-18
Document Number: 50008
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
RWM
www.vishay.com
Vishay Sfernice
RWM
4 x 22
4.5 W
5W
7W
0.1
16 k
0.1
6.8 k
300 V
-
RWM
5 x 26
6W
7W
10 W
0.1
27 k
0.15
10 k
350 V
RWM
6 x 22
6W
7W
10 W
0.1
39 k
0.15
39 k
350 V
RWM
8 x 26
7W
8W
10 W
0.1
27 k
-
500 V
-
RWM
6 x 34
7W
8W
12 W
0.33
36 k
0.33
15 k
500 V
31 k
RWM
8 x 34
9.5 W
11 W
14 W
0.33
36 k
-
650 V
-
RWM
8 x 45
9.5 W
11 W
20 W
0.47
62 k
0.47
33 k
650 V
38 k
RWM
10 x 45
21 W
25 W
25 W
0.47
62 k
-
800 V
RWM
10 x 64
21 W
25 W
25 W
0.68
100 k
-
800 V
RWM
10 x 65
25.8 W
30 W
30 W
0.68
100 k
-
800 V
TECHNICAL SPECIFICATIONS
VISHAY SFERNICE SERIES
AND STYLE
at +70 °C
at +25 °C
Power Rating
With Surface
Temp.
+450 °C
RWM
4 x 10
2.6 W
3W
5.5 W
0.1
10 k
0.1
10 k
120 V
4.8 k
Ohmic Range in Relation to
Tolerance ± 5 % E24 Series
Qualified Ohmic Range
NF C 83-210
Limiting Element Voltage
Critical Resistance
18.8 k 17.5 k
25.6 k 25.6 k 21.3 k
PERFORMANCE
CECC 40201 - EN 140-201
TESTS
Short Time Overload
Temperature Cycling
(5 cycles)
Humidity (Steady State)
Terminal Strength
CONDITIONS
10
P
r
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
P
r
90’/30’ cycle
25 °C ambient
REQUIREMENTS
± (2 % + 0.1
)
± (1 % + 0.05
)
± (5 % + 0.1
)
± (1 % + 0.05
)
TYPICAL DRIFTS
± (0.5 % + 0.05
)
± (0.5 % + 0.05
)
± (0.5 % + 0.05
)
± (0.1 % + 0.05
)
Load Life
± (5 % + 0.1
)
± (1.5 % + 0.05
)
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
Temperature Coefficient
Dielectric Withstanding Voltage NF EN140000
Inductance
Standard
On request
± 5 % (NI ± 10 %)
± 1 % and ± 2 % (NI ± 5 %)
+75 ppm/°C typical
500 V
RMS
- 1 min - 10 mA
Non inductive (Ayrton-Perry) winding available
Revison: 13-Oct-18
Document Number: 50008
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
RWM
www.vishay.com
POWER RATING
116
100
Vishay Sfernice
TYPICAL TEMPERATURE RISE
4x
26
22
-6
x2
2
8x
26
6x
8
34
x
34
500
HOT SPOT TEMPERATURE IN °C
4x
8
x
45
10 x
10
45
x
10
64
RATED POWER IN %
400
75
300
50
200
25
100
5x
x
10
65
Optional
0
0
25
100
200
300
350
0
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28 30
AMBIENT TEMPERATURE IN °C
RATED POWER IN W
MARKING
Vishay Sfernice trademark, model and 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
1U2
OHMIC VALUE
Custom items
are subject to
extra charge and
minimum order.
Please see price list.
±5%
TOLERANCE
AM500
PACKAGING
e1
LEAD
(Pb)-FREE
GLOBAL PART NUMBER INFORMATION
R
W
M
0
4
1
0
1
R
2
0
J
R
1
5
E
1
GLOBAL
MODEL
RWM
SIZE
d x L:
0410
0422
0526
0622
0826
0634
0834
0845
1045
1064
1065
OPTION
Blank
OHMIC VALUE
TOLERANCE
F
=1%
G
=2%
J
=5%
K
= 10 %
PACKAGING
Size 0410,
0422, 0526,
0826, 0622:
R15
= Reel
(1000 pieces)
Size 0845,
1045, 1064,
1065:
B25
= box
(50 pieces)
Size 0634:
S09
= bag
(50 pieces)
Other
packaging
existing.
SPECIAL
As
applicable.
Ex:
AD7
LEAD
(Pb)-FREE
Sn(99),
Ag(0.3),
Cu(0.7):
E1
The first three digits are
significant figures and the
last digit specifies the
or
number of zeros to follow.
R designates decimal point.
N
48R7
= 48.7
1R20
= 1.2
(non inductive
1002
= 10 000
winding)
R330
= 0.33
...
Revison: 13-Oct-18
Document Number: 50008
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
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Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
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© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
