WW/MWW/NWW Series
Stackpole Electronics, Inc.
General Purpose and Precision Wirewound Resistor
Features:
•
•
•
•
•
•
•
•
•
•
•
Resistive Product Solutions
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
Type / Code
MIL-R-26 Ref.
Dielectric
Strength (V)
(1)
Power Rating
(Watts)
@ 125ºC
Power Rating
(Watts)
@ 70ºC
0.4W
1W
1W
1.5W
2.5W
2.5W
3W
3W
3W
4W
4W
5W
5W
6.5W
6.5W
7W
10W
10W
1W
3W
5W
10W
0.5 W
1.1 W
1.3 W
2.1 W
2.6 W
2.6 W
3.2 W
3.2 W
3.4 W
4.3 W
4.3 W
5.1 W
5.1 W
7.2 W
7.2 W
7.7 W
11.0 W
11.0 W
1.3 W
3.2 W
5.5 W
11.0 W
WW12 / NWW12
500V
WW1 / NWW1
500V
WW1A / NWW1A
RW-70
500V
WW2 / NWW2
RW-69
1,000V
WWS2 / NWWS2
500V
WW2A / NWW2A
1,000V
WW3 / NWW3
RW-79
1,000V
WWS3 / NWWS3
1,000V
WW3A / NWW3A
1,000V
WW4 / NWW4
1,000V
WWS4 / NWWS4
RW-79
1,000V
WW5 / NWW5
RW-67, RW-74
1,000V
WWS5 / NWWS5
1,000V
WW7 / NWW7
1,000V
WWS7 / NWWS7
RW-67, RW-74
1,000V
WW7B / NWW7B
1,000V
WW10 / NWW10
RW-78
1,000V
WWS10 / NWWS10
1,000V
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
(1) Lesser of √PR or maximum working voltage
TCR (ppm/ºC)
< 1Ω = ±90ppm/ºC
1Ω to 10Ω = ±50ppmºC
>10Ω = ±20ppm/ºC
Ohmic Range(Ω) and Tolerance
0.1%, 0.5%, 1% & 5%
Standard
Non-Inductive
0.1 - 2K
0.1 - 1K
0.1 - 3K
0.1 - 1.5K
0.1 - 7K
0.1 - 3.5K
0.1 - 10K
0.1 - 5K
0.1 - 3K
0.1 - 1.5K
0.1 - 15K
0.1 - 7.5K
0.1 - 22K
0.1 - 11K
0.1 - 10K
0.1 - 5K
0.1 - 30K
0.1 - 15K
0.1 - 40K
0.1 - 20K
0.1 - 22K
0.1 - 11K
0.1 - 50K
0.1 - 25K
0.1 - 40K
0.1 - 20K
0.1 - 70K
0.1 - 35K
0.1 - 50K
0.1 - 25K
0.1 - 100K
0.1 - 50K
0.1 - 150K
0.1 - 75K
0.1 - 100K
0.1 - 50K
0.1 - 2K
0.1 - 20K
0.1 - 40K
0.1 - 150K
Performance Characteristics
Test
Test Condition
Result
Moisture Resistance
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
1% max
Load Life
Temperature Cycling
Short Time Overload
1%
0.5%
1%
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.
1
www.seielect.com
marketing@seielect.com