09-18-534-6803 - HARTING TECHNOLOGY GROUP

RWM

www.vishay.com Vishay Sfernice

Revison: 13-Oct-18 1Document Number: 50008

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

Enamelled Wirewound Power Resistors Axial Leads

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.

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

• 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

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

A 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

Ø B 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

Weight in g1232.2344881414

STANDARD ELECTRICAL SPECIFICATIONS

MODEL SIZE

RESISTANCE

RANGE



RATED POWER

P25 °C

LIMITING ELEMENT

VOLTAGE

TOLERANCE

± %

RWM 4 x 10 0410 0.1 to 10K 3 120 1, 2, 5

RWM 4 x 22 0422 0.1 to 16K 5 300 1, 2, 5

RWM 5 x 26 0526 0.1 to 27K 7 350 1, 2, 5

RWM 6 x 22 0622 0.1 to 39K 7 350 1, 2, 5

RWM 8 x 26 0826 0.1 to 27K 8 500 1, 2, 5

RWM 6 x 34 0634 0.33 to 36K 8 500 1, 2, 5

RWM 8 x 34 0834 0.33 to 36K 11 650 1, 2, 5

RWM 8 x 45 0845 0.47 to 62K 11 650 1, 2, 5

RWM 10 x 45 1045 0.47 to 62K 25 800 1, 2, 5

RWM 10 x 64 1064 0.68 to 100K 25 800 1, 2, 5

RWM 10 x 65 1065 0.68 to 100K 30 800 1, 2, 5

25 min A 25 min.

Ø 0.8 ± 0.1

Ø B

RWM

www.vishay.com Vishay Sfernice

Revison: 13-Oct-18 2Document Number: 50008

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

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 5 mm from the resistor body.

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.

TECHNICAL SPECIFICATIONS

VISHAY SFERNICE SERIES

AND STYLE

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

Power Rating

at +70 °C 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

at +25 °C 3 W 5 W 7 W 7 W 8 W 8 W 11 W 11 W 25 W 25 W 30 W

With Surface

Temp.

 +450 °C

5.5 W 7 W 10 W 10 W 10 W 12 W 14 W 20 W 25 W 25 W 30 W

Ohmic Range in Relation to

Tolerance ± 5 % E24 Series

0.1 

10 k

0.1 

16 k

0.1 

27 k

0.1 

39 k

0.1 

27 k

0.33 

36 k

0.33 

36 k

0.47 

62 k

0.47 

62 k

0.68 

100 k

0.68 

100 k

Qualified Ohmic Range

NF C 83-210

0.1 

10 k

0.1 

6.8 k

0.15 

10 k

0.15 

39 k-0.33 

15 k-0.47 

33 k---

Limiting Element Voltage 120 V 300 V 350 V 350 V 500 V 500 V 650 V 650 V 800 V 800 V 800 V

Critical Resistance 4.8 k- 18.8 k17.5 k- 31 k-38 k25.6 k25.6 k21.3 k

PERFORMANCE

CECC 40201 - EN 140-201 TYPICAL DRIFTS

TESTS CONDITIONS REQUIREMENTS

Short Time Overload 10 Pr during 10 s

25 °C ambient ± (2 % + 0.1 ) ± (0.5 % + 0.05 )

Temperature Cycling

(5 cycles) -55 °C +200 °C ± (1 % + 0.05 ) ± (0.5 % + 0.05 )

Humidity (Steady State) 56 days

40 °C ambient - R.H. 95 % ± (5 % + 0.1 ) ± (0.5 % + 0.05 )

Terminal Strength

Tensile test: 20 N

2 successive bending

2 full rotations of 180°

± (1 % + 0.05 ) ± (0.1 % + 0.05 )

Load Life

1000 h at Pr

90’/30’ cycle

25 °C ambient

± (5 % + 0.1 ) ± (1.5 % + 0.05 )

ELECTRICAL SPECIFICATIONS

Tolerance Standard ± 5 % (NI ± 10 %)

On request ± 1 % and ± 2 % (NI ± 5 %)

Temperature Coefficient +75 ppm/°C typical

Dielectric Withstanding Voltage NF EN140000 500 VRMS - 1 min - 10 mA

Inductance Non inductive (Ayrton-Perry) winding available

RWM

www.vishay.com Vishay Sfernice

Revison: 13-Oct-18 3Document Number: 50008

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

POWER RATING TYPICAL TEMPERATURE RISE

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).

AMBIENT TEMPERATURE IN °C

0 25 100 200 300 350

100

116

RATED POWER IN %

400

500

300

200

100

RATED POWER IN W

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

46 x 01

8 x 26

4 x 10

Optional

HOT SPOT TEMPERATURE IN °C

ORDERING INFORMATION

RWM 4 x 10 XXX 1U2 ± 5 % AM500 e1

MODEL STYLE NI OPTIONAL

Non Inductive

Winding

SPECIAL

DESIGN

Method N°

Optional

OHMIC VALUE

Custom items

are subject to

extra charge and

minimum order.

Please see price list.

TOLERANCE PACKAGING LEAD

(Pb)-FREE

GLOBAL PART NUMBER INFORMATION

GLOBAL

MODEL SIZE OPTION OHMIC VALUE TOLERANCE PACKAGING SPECIAL LEAD

(Pb)-FREE

RWM d x L:

0410

0422

0526

0622

0826

0634

0834

0845

1045

1064

1065

Blank

(non inductive

winding)

The first three digits are

significant figures and the

last digit specifies the

number of zeros to follow.

R designates decimal point.

48R7 = 48.7 

1R20 = 1.2 

1002 = 10 000 

R330 = 0.33 

...

F = 1 %

G = 2 %

J = 5 %

K = 10 %

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.

applicable.

Ex: AD7

Sn(99),

Ag(0.3),

Cu(0.7):

410 1R2 J 1MR 0W 0R5 1E

Legal Disclaimer Notice

www.vishay.com Vishay

Revision: 08-Feb-17 1Document Number: 91000

Disclaimer



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RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.

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