Rev Date: 11/29/2021

1

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This specification may be changed at any time without prior notice.

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Please confirm technical specifications before you order and/or use.

WW / MWW / NWW / WWS Series

General Purpose and Precision Wirewound Resistor

Stackpole Electronics, Inc.

Resistive Product Solutions

Features:

•

WWS offers miniature size at higher power rating

•

High performance for low cost

•

High power to size ratio

•

High temperature silicone coating

•

MWW/NMWW – completely molded construction with welded terminations

•

Complete welded terminations

•

Tinned copper leads

•

Available in non-inductive styles

•

Tighter tolerances may be available for non-inductive styles - contact Stackpole with requirements

•

Higher operating temperatures available

•

“B” packaging code denotes bulk packaging - contact Stackpole for package quantities

•

WW/NWW/WWS meet UL94V-0

•

100% RoHS compliant and lead free without exemption

•

Halogen free

•

REACH compliant

Electrical Specifications – WW, WWS, MWW

@ 125°C

@ 70°C

0.1%

0.5%

1%

5%

WW12

-

0.4

0.5

5 - 2K

5 - 2K

WW1

-

1

1.1

WW1A

RW-70

1

1.3

WW2

RW-69

1.5

2.1

1 - 10K

WWS2

-

2.5

2.6

1 - 10K

WW2A

-

2.5

2.6

1 - 10K

WW3

RW-79

3

3.2

1 - 22K

WWS3

-

3

3.2

3 - 10K

WW3A

-

3

3.4

1 - 30K

WW4

-

4

4.3

1 - 40K

WWS4

RW-79

4

4.3

1 - 22K

WW5

RW-67, RW-74

5

5.1

1 - 50K

WWS5

-

5

5.1

1 - 40K

WW7

-

6.5

7.2

1 - 70K

WWS7

RW-67, RW-74

6.5

7.2

1 - 50K

WW7B

-

7

7.7

1 - 70K

WW10

RW-78

10

11

1 - 100K

WWS10

-

10

11

1 - 70K

MWW1

RW-70

1

1.3

MWW3

RW-79

3

3.2

MWW5

RW-67, RW-74

5

5.5

MWW10

RW-68, RW-74

10

11

Max Voltage Rating =

0.5 - 22K

1 - 10K

0.5 - 30K

Type/Code

MIL-R-26 Ref.

TCR (ppm/ºC)

Ohmic Range (Ω) and Tolerance

(*)

3 - 2K

2 - 3K

1 - 5K

0.5 - 10K

0.5 - 10K

Power Rating (Watts)

3 - 20K

2 - 40K

2 - 80K

< 1 Ω = ± 90 ppm/ºC

1 Ω to 10 Ω = ± 50 ppm/ºC

> 10 Ω = ± 20 ppm/ºC

(*) Other resistance values available - contact Stackpole for details.

0.5 - 50K

0.5 - 70K

0.5 - 100K

0.5 - 70K

5 - 2K

0.5 - 40K

0.5 - 22K

0.5 - 50K

0.5 - 40K

0.5 - 70K

0.5 - 10K

√P*R