WSM1 View Datasheet(PDF) - Welwyn Components Limited
Part Name
Description
MFG CO.
WSM1 Datasheet PDF : 2 Pages
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Moulded Surface Mount
Wirewound Resistors
WSM Series
Welwyn Components
Physical Data
Dimensions (mm)
Ao
Bo
Ko
W
WSM1
4.2
7.62
4.2
16
P
t
Po
8
0.36 4 ± 0.1
WSM2 6.75 11.95 5.22
24
12
0.36 4 ± 0.1
WSM3
7.3
18.3
6.7
32
12
0.4 4 ± 0.1
All other dimensions as per EIA481 standard
Performance Data
Load at rated power: 1000 hrs @ 70°C
Dry heat
1000 hrs @ 155°C
Short term overload
Derating from rated power @ 70°C
Moisture
Temperature cycling
Resistance to solder heat
Isolation voltage
Insulation resistance
Substrate bend
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
V
ohms
∆R%
WSM1
2 ± 0.001Ω
2 ± 0.001Ω
1 ± 0.001Ω
Note: The power ratings to be applied depend upon the board used and the ambient temperature.
WSM2
2 ± 0.001Ω
2 ± 0.001Ω
2 ± 0.001Ω
zero at 155°C
1 ± 0.001Ω
1 ± 0.001Ω
1 ± 0.001Ω
1,000
>1000M
0.2 ± 0.001Ω
WSM3
3 ± 0.001Ω
3 ± 0.001Ω
1.5 ± 0.001Ω
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
46
Issue C · 04.02
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