General Purpose Power
Wirewound Resistors
PW Series
Welwyn Components
•
2 watts to 25 watts
•
0.10 ohms to 30K ohms
•
±10% or ±5% tolerance
•
TC’s from 300 ppm/°C to +5500 ppm/°C
Electrical Data
PW-2
Power rating at 25°C
Resistance range
over R range
watts
ohms
0.03%/°C
+0.55%/°C
+0.45%/°C
+0.25%/°C
2
0R15 to 2K4
0.15 to 0.99
1.0 to 2.4K
0.1 to 30
0.24 to 130
1.0 to 10
PW-3
3
0R1 to 7K5
0.1 to 0.99
1.0 to 7.5K
0.1 to 86
0.1 to 270
0.24 to 20
PW-5
5
0R1 to 8K5
0.1 to 0.99
1.0 to 8.5K
0.1 to 68
0.1 to 300
0.27 to 22
PW-7
7
0R1 to 18K
0.1 to 0.99
1.0 to 18K
0.1 to 150
0.15 to 680
1.0 to 51
PW-10
10
0R18 to 30K
0.18 to 0.99
1.0 to 30K
0.1 to 240
1.0 to 82
PW-15
15
0R18 to 30K
0.18 to 0.99
1.0 to 30K
0.1 to 240
1.0 to 82
PW-18
18
0R18 to 22K
0.18 to 0.99
1.0 to 22K
0.1 to 200
1.0 to 70
PW-22
22
0R27 to 18K
0.27 to 1.3
1.5 to 12K
0.15 to 360
1.0 to 120
PW-25
25
0R27 to 18K
0.27 to 1.3
1.5 to 10K
0.15 to 300
1.5 to 100
Temperature coefficient 0.06%/°C
0.24 to 1100 0.24 to 1100 0.24 to 1100 0.36 to 1800 0.36 to 1200
Please note: When ordering the alternative configuration please add an ‘A’ after the part number. (i.e., PW-2A)
Physical Data
Dimensions (mm)
L ±0.8
PW-2
PW-3
PW-5
PW-7
PW-10
PW-15
PW-18
PW-22
PW-25
17.5
22.4
22.4
35.3
47.8
47.8
47.8
63.5
63.5
W ±0.8
6.35
7.87
9.65
9.65
9.65
12.7
12.7
12.7
12.7
H ±0.8
6.35
7.87
8.64
8.64
8.64
12.7
12.7
12.7
12.7
d dia.
0.8
0.91
0.91
0.91
0.91
0.91
0.91
1.0*
1.0*
E ±0.8
7.87
9.65
10.4
11.9
11.9
16.0
16.0
16.0
16.0
LL min.
36.6
36.6
38.1
38.1
38.1
38.1
38.1
38.1
38.1
F (ref.)
1.60
1.60
1.60
3.18
3.18
3.18
3.18
3.18
3.18
* Copper Clad Steel
Standard Configuration
d
W
H
LL
L
0.125 max.
Alternate Configuration
E
F
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
Issue B · 03.02
© 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
111