Semi-Precision Power
Wirewound Resistors
PPW Series
Welwyn Components
Physical Data
Dimensions (mm)
Standard Configuration
d
W
H
25.4
min
Type
PPW-2
PPW-3
PPW-5
PPW-7
PPW-10
PPW-15
Alternate Configuration
E
L
3.17 max.
L ± 0.8
1705
22.3
22.3
35.3
47.7
47.7
W ± 0.8
6.99
7.87
9.65
9.65
9.65
12.7
H ± 0.8
6.99
7.87
8.89
8.89
8.89
12.7
d dia.
0.8
0.8
0.8
0.8
0.8
0.8
E ± 0.8
8.134
9.65
10.4
11.9
11.9
12.7
Temperature Rise
Hot Spot Temperature (°C)
250
200
150
100
50
0
0
20
40
60
80
100 120
% Rated Load
PPW-15
PPW-10
PPW-7
PPW-5
PPW-3
PPW-2
Power Derating
100
80
PPW-3, 5, 7, 10
% Rated Load
60
150
40
20
0
0
50
100
150
200
Ambient Temperature (°C)
250
Max. Recommended
Ambient Operating
Temperature 150°C
25 40
65
PPW-2
PPW-15
© 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
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Issue B · 03.02
WELWYN [ WELWYN COMPONENTS LIMITED ]
