Rev Date: 11/29/2021

3

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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

Performance Characteristics

Power Derating Curve:

Test

Test Condition

Test Specification

Moisture Resistance

1000 hours, 95% R.H., 40ºC

1% max

Load Life

1000 hours,

cycled power 1.5 hours ON, 0.5 hours OFF, 25ºC

1%

Temperature Cycling

5 cycles, -55ºC to 200°C

0.5%

Short Time Overload

5 times rated power for 5 seconds

1%

Dielectric Withstand Voltage

Resistor leads are grounded and high potential probe is

touched to the resistor body

500V for (N)WW12, 1, 1A and 2S.

1000V for all others

Operating Temperature Range: -55ºC to +350ºC

Mechanical Specifications (cont.)

0.875 ± 0.062

0.312 ± 0.031

0.036 ± 0.002

1.500 typ.

inches

22.23 ± 1.57

7.92 ± 0.79

0.91 ± 0.05

38.10 typ.

mm

1.025 ± 0.062

0.312 ± 0.031

0.036 ± 0.002

1.500 typ.

inches

26.04 ± 1.57

7.92 ± 0.79

0.91 ± 0.05

38.10 typ.

mm

1.225 ± 0.062

0.312 ± 0.031

0.036 ± 0.002

1.500 typ.

inches

31.12 ± 1.57

7.92 ± 0.79

0.91 ± 0.05

38.10 typ.

mm

1.780 ± 0.062

0.375 ± 0.031

0.040 ± 0.002

1.500 typ.

inches

45.21 ± 1.57

9.53 ± 0.79

1.02 ± 0.05

38.10 typ.

mm

0.385 ± 0.062

0.135 ± 0.031

0.032 ± 0.002

1.500 typ.

inches

9.78 ± 1.57

3.43 ± 0.79

0.81 ± 0.05

38.10 typ.

mm

0.560 ± 0.062

0.205 ± 0.031

0.032 ± 0.002

1.500 typ.

inches

14.22 ± 1.57

5.21 ± 0.79

0.81 ± 0.05

38.10 typ.

mm

0.925 ± 0.062

0.330 ± 0.031

0.036 ± 0.002

1.500 typ.

inches

23.50 ± 1.57

8.38 ± 0.79

0.91 ± 0.05

38.10 typ.

mm

1.965 ± 0.062

0.480 ± 0.031

0.040 ± 0.002

1.500 typ.

inches

49.91 ± 1.57

12.19 ± 0.79

1.02 ± 0.05

38.10 typ.

mm

(1) See "Resistor Packaging Specification Document" for lead length dimension for tape and reel packaged product.

(2) Lead diameter (C) available in 0.036" / 0.91 mm.

MWW10

WW5, WWS7

WW10

MWW1

MWW3

MWW5

/

/

/

NWW5, NWWS7

NWW10

(2)

Type/Code

WW7 / NWW7

WW7B, WWS10 /

/

/

/

NMWW1

NMWW3

NMWW5

NMWW10

Unit

(Bulk)

(1)

NWW7B, NWWS10

A

B

C

D