WSM1 查看數據表（PDF） - Unspecified
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WSM1 Datasheet PDF : 4 Pages
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Welwyn Components
Packing Data
Dimensions (mm)
Ao
Bo
Ko
W
WSM1
4.2
7.62
4.2
16
P
t
8
0.36
WSM2 6.75 11.95 5.22
24
12
0.36
WSM3
7.3
18.3
6.7
32
12
0.4
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 275°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
Ordering Procedure
Example: WSM2 at 4.7 ohms and 5% tolerance on a reel of 800 pieces –
Type
WSM2– 4R7JI
Value (use IEC62 code)
Tolerance (use IEC62 code)
F 1% J 5%
G 2% K 10%
Packing
I
Tape
WSM1
WSM2
WSM3
1500/reel
800/reel
750/reel
Standard
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
T©eleTpThoEnlee:c+tr4o4n(i0c)s1p6lc70 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
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www.ttelectronicsresistors.com
Issue C · 04.02
11.14
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