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WW/MWW/NWW 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

MWW – completely molded construction with welded terminations

Complete welded terminations

Tinned copper leads

Available in non-inductive styles

High temperature silicone coating

RoHS compliant

Higher operating temperatures available

Bulk packaging available - contact Stackpole for package quantities

Electrical Specifications

Dielectric

Power Rating

Ohmic Range( ? ) and Tolerance

Type / Code

MIL-R-26 Ref.

Strength (V)

(Watts)

TCR (ppm/oC)

0.1%, 0.5%, 1% & 5%

(1)

@ 125oC

@ 70oC

Standard Non-Inductive

WW12 / NWW12

500V

0.4W

0.5 W

0.1 - 2K 0.1 - 1K

WW1 / NWW1 -

500V

1.1 W

0.1 - 3K 0.1 - 1.5K

WW1A / NWW1A RW-70 500V

1.3 W

0.1 - 7K 0.1 - 3.5K

WW2 / NWW2 RW-69 1,000V

1.5W

2.1 W

< 1 ? = ±90ppm/oC

0.1 - 10K 0.1 - 5K

WWS2 / NWWS2 -

WW2A / NWW2A -

500V

1,000V

2.5W

2.6 W

0.1 - 3K 0.1 - 1.5K

0.1 - 15K 0.1 - 7.5K

WW3 / NWW3 RW-79 1,000V

3.2 W

0.1 - 22K 0.1 - 11K

WWS3 / NWWS3 -

WW3A / NWW3A -

1,000V

3.2 W

3.4 W

0.1 - 10K 0.1 - 5K

0.1 - 30K 0.1 - 15K

WW4 / NWW4

1,000V

4.3 W

0.1 - 40K 0.1 - 20K

WWS4 / NWWS4 RW-79 1,000V

WW5 / NWW5 RW-67, RW-74 1,000V

4.3 W

5.1 W

1 ? to 10 ? = ±50ppmoC

0.1 - 22K 0.1 - 11K

0.1 - 50K 0.1 - 25K

WWS5 / NWWS5 -

1,000V

5.1 W

0.1 - 40K 0.1 - 20K

WW7 / NWW7

1,000V

6.5W

7.2 W

0.1 - 70K 0.1 - 35K

WWS7 / NWWS7 RW-67, RW-74 1,000V

6.5W

7.2 W

0.1 - 50K 0.1 - 25K

WW7B / NWW7B -

1,000V

7.7 W

0.1 - 100K 0.1 - 50K

WW10 / NWW10 RW-78 1,000V

10W

11.0 W

0.1 - 150K 0.1 - 75K

WWS10 / NWWS10 -

1,000V

10W

11.0 W

0.1 - 100K 0.1 - 50K

MWW1 / NMWW1 RW-70 1,000V

MWW3 / NMWW3 RW-79 1,000V

MWW5 / NMWW5 RW-67, RW-74 1,000V

MWW10 / NMWW10 RW-68, RW-74 1,000V

10W

1.3 W

3.2 W

5.5 W

11.0 W

>10 ? = ±20ppm/oC

0.1 - 2K

0.1 - 20K

0.1 - 40K

0.1 - 150K

(1) Lesser of √ PR or maximum working voltage

Performance Characteristics

Test

Moisture Resistance

Load Life

Temperature Cycling

Short Time Overload

Test Condition

1000 hours, 95% R.H., 40oC

1000 hours,

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

5 cycles, -55oC to 200oC

5 times rated power for 5 seconds

Result

1% max

0.5%

Operating Temperature Range: -55oC to +350oC

Rev Date: 08/20/2012

This specification may be changed at any time without prior notice

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

www.seielect.com

marketing@seielect.com

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