Rev Date: 11/29/2021

2

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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

Electrical Specifications – Non-Inductive Styles

Mechanical Specifications

@ 125°C

@ 70°C

NWW12

-

0.4

0.5

NWW1

-

1

1.1

NWW1A

RW-70

1

1.3

NWW2

RW-69

1.5

2.1

NWWS2

-

2.5

2.6

NWW2A

-

2.5

2.6

NWW3

RW-79

3

3.2

NWWS3

-

3

3.2

NWW3A

-

3

3.4

NWW4

-

4

4.3

NWWS4

RW-79

4

4.3

NWW5

RW-67, RW-74

5

5.1

NWWS5

-

5

5.1

NWW7

-

6.5

7.2

NWWS7

RW-67, RW-74

6.5

7.2

NWW7B

-

7

7.7

NWW10

RW-78

10

11

NWWS10

-

10

11

NMWW1

RW-70

1

1.3

NMWW3

RW-79

3

3.2

NMWW5

RW-67, RW-74

5

5.5

NMWW10

RW-68, RW-74

10

11

Max Voltage Rating =

TCR (ppm/ºC)

Power Rating (Watts)

1 - 35K

1 - 25K

1 - 35K

< 1 Ω = ± 90 ppm/ºC

1 Ω to 10 Ω = ± 50 ppm/ºC

> 10 Ω = ± 20 ppm/ºC

2 - 20K

2 - 40K

1 - 15K

1 - 20K

1 - 11K

1 - 5K

1 - 5K

1 - 11K

3 - 5K

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

Ohmic Range (Ω) and Tolerance

(*)

1 - 50K

1 - 35K

5 - 1K

3 - 10K

1 - 25K

1 - 20K

< 1 Ω = ± 90 ppm/ºC

1 Ω to 10 Ω = ± 50 ppm/ºC

> 10 Ω = ± 20 ppm/ºC

10 - 1K

1% and 5%

2 - 1.5K

1 - 2.5K

1 - 5K

Type/Code

MIL-R-26 Ref.

0.312 ± 0.062

0.110 ± 0.031

0.025 ± 0.002

1.500 typ.

inches

7.92 ± 1.57

2.79 ± 0.79

0.64 ± 0.05

38.10 typ.

mm

0.375 ± 0.062

0.110 ± 0.031

0.025 ± 0.002

1.500 typ.

inches

9.53 ± 1.57

2.79 ± 0.79

0.64 ± 0.05

38.10 typ.

mm

0.420 ± 0.062

0.110 ± 0.031

0.025 ± 0.002

1.500 typ.

inches

10.67 ± 1.57

2.79 ± 0.79

0.64 ± 0.05

38.10 typ.

mm

0.370 ± 0.062

0.156 ± 0.031

0.032 ± 0.002

1.500 typ.

inches

9.40 ± 1.57

3.96 ± 0.79

0.81 ± 0.05

38.10 typ.

mm

0.550 ± 0.062

0.156 ± 0.031

0.032 ± 0.002

1.500 typ.

inches

13.97 ± 1.57

3.96 ± 0.79

0.81 ± 0.05

38.10 typ.

mm

0.560 ± 0.062

0.187 ± 0.031

0.032 ± 0.002

1.500 typ.

inches

14.22 ± 1.57

4.75 ± 0.79

0.81 ± 0.05

38.10 typ.

mm

0.500 ± 0.062

0.218 ± 0.031

0.032 ± 0.002

1.500 typ.

inches

12.70 ± 1.57

5.54 ± 0.79

0.81 ± 0.05

38.10 typ.

mm

0.700 ± 0.062

0.270 ± 0.031

0.036 ± 0.002

1.500 typ.

inches

17.78 ± 1.57

6.86 ± 0.79

0.91 ± 0.05

38.10 typ.

mm

A

B

C

Unit

Type/Code

D

(Bulk)

(1)

/

/

/

/

/

WW12

WW3, WWS4

WW3A

WW4, WWS5

WW1, WWS2

WW1A

WW2, WWS3

WW2A

NWW12

NWW1, NWWS2

NWW1A

NWW2, NWWS3

NWW2A

NWW3, NWWS4

/

/

NWW3A

NWW4, NWWS5

/