General Purpose Power
General
Purpose Power
General
Purpose Power
Wirewound Resistors
Wirewound Resistors
Wirewound Resistors
PW
PW Series
Series
PW Series
•
2
to 25 watts
2 watts
watts to 25 watts
•
2 watts
ohms to
watts
•
0.10
to 25
30K
0.10 ohms to 30K ohms
ohms
•
0.10 ohms to 30K ohms
±10% or ±5%
±5% tolerance
•
±10% or
tolerance
•
±10% or ±5%
ppm/°C to +5500 ppm/°C
TC’s from
from tolerance
•
TC’s
300
300 ppm/°C to +5500 ppm/°C
•
TC’s from 300 ppm/°C to +5500 ppm/°C
Welwyn Components
Welwyn Components
·
·
·
·
Electrical Data
Electrical Data
Power rating at 25°C
Power rating at 25°C
Resistance range
watts
PW-2
watts
PW-2
2
PW-3
PW-3
3
PW-5
0R1 to 7K5 5
PW-5
5
PW-7
0R1 to 8K5 7
PW-7
7
PW-10
PW-10
10
PW-15
PW-15
15
PW-18
PW-18
18
PW-22
PW-22
22
PW-25
PW-25
25
ohms2 0R15 to 2K43
15
18
22
25
0R1 to 18K10 0R18 to 30K 0R18 to 30K 0R18 to 22K 0R27 to 18K 0R27 to 18K
Resistance range
ohms 0R15 0.15 0.99 0.1 0.99
Temperature coefficient 0.06%/°Cto 2K4 to0R1 to 7K5 to 0R1 to 8K5 to 0R1 to 18K to0R18 to 30K to 0.99to 30K to 0.99to 22K to 0.99to 18K to 1.3 to 18K to 1.3
0.1 0.99
0.1 0.99 0.18 0R18 0.18 0R18 0.18 0R27
0.27 0R27
0.27
Temperature coefficient 0.06%/°C0.03%/°C 0.99 to 0.1 to 0.99 to 0.1 to 0.99 to 0.1 to 0.99 to0.18 to 0.99 to0.18 to 0.99 to0.18 to 0.99 to 0.27 to 1.3 to 0.27 to 1.3 to 10K
0.15 to 1.0 2.4K
over R range
1.0 7.5K
1.0 8.5K
1.0 18K
1.0 30K
1.0 30K
1.0 22K
1.5 12K
1.5
over R range
0.03%/°C 1.0 to 2.4K to1.0 to 7.5K to1.0 to 8.5K to1.0 to 18K to 1.0 to 30K to 1.0 to 30K to 1.0 to 22K to 1.5 to 12K to1.5 to 10K to 300
+0.55%/°C
0.1 30
0.1 86
0.1 68
0.1 150
0.1 240
0.1 240
0.1 200
0.15 360 0.15
+0.55%/°C
0.1
0.1
+0.45%/°Cto 30 to 0.1 to 860.1 to 270 to 680.1 to 0.1 to 150 to0.1 to 240 to 0.1 to 240 to 0.1 to 200 to0.15 to 360 to0.15 to 300 to 1200
0.24 130
300
0.15 680 0.24 1100 0.24 1100 0.24 1100 0.36 1800 0.36
+0.45%/°C 0.24 to 130 to0.1 to 270 to 20to 300 to 22 to 680 to 51 to 1100 to 82 to 1100 to 82 to 1100 to 70 to 1800 to 120to 1200 to 100
+0.25%/°C
1.0 10
0.24 0.1
0.27 0.15
1.0 0.24
1.0 0.24
1.0 0.24
1.0 0.36
1.0 0.36
1.5
+0.25%/°C
1.0 to 10
0.24 to 20
0.27 to 22
1.0 to 51
1.0 to 82
1.0 to 82
1.0 to 70
1.0 to 120
1.5 to 100
Please note: When ordering the alternative configuration please add an ‘A’ after the part number. (i.e., PW-2A)
Please note: When ordering the alternative configuration please add an ‘A’ after the part number. (i.e., PW-2A)
Physical Data
Physical Data
Dimensions (mm)
Dimensions (mm)
PW-2
PW-2 PW-3
PW-3 PW-5
PW-5 PW-7
PW-7 PW-10
PW-10 PW-15
PW-15 PW-18
PW-18 PW-22
PW-22 PW-25
17.5
22.4
22.4
35.3
47.8
47.8
47.8
63.5
L ±0.8
L ±0.8 17.5
22.4
22.4
35.3
47.8
47.8
47.8
63.5
63.5
6.35
7.87
9.65
9.65
9.65
12.7
12.7
12.7
12.7
W ±0.8
W ±0.8 6.35
7.87
9.65
9.65
9.65
12.7
12.7
12.7
12.7
6.35
7.87
8.64
8.64
8.64
12.7
12.7
12.7
12.7
H ±0.8
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*
d dia.
0.8
0.91
0.91
0.91
0.91
0.91
0.91
1.0*
1.0*
7.87
9.65
10.4
11.9
11.9
16.0
16.0
16.0
16.0
E ±0.8
E ±0.8 7.87
9.65
10.4
11.9
11.9
16.0
16.0
16.0
16.0
36.6
36.6
38.1
38.1
38.1
38.1
38.1
38.1
38.1
LL min.
LL min. 36.6
36.6
38.1
38.1
38.1
38.1
38.1
38.1
38.1
1.60
1.60
1.60
3.18
3.18
3.18
3.18
3.18
3.18
F (ref.)
F (ref.) 1.60
1.60
1.60
3.18
3.18
3.18
3.18
3.18
3.18
PW-25
* Copper Clad
63.5
Steel
* Copper Clad Steel
Standard Configuration
Standard Configuration
d
LL
LL
L
L
0.125 max.
d
W
H
0.125 max.
W
H
Alternate Configuration
Alternate Configuration
E
F
F
E
General Note
General Note
General Note
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
Welwyn Components reserves the right to make changes in product specification without notice or liability.
A subsidiary of
Welwyn Components reserves
to
right to make changes in product specification without
liability.
TT electronics reserves the right
the
make changes in product specification without notice or
notice or liability.
TT electronics plc
A subsidiary of
All information is subject
to TT electronics’
Limited
· Bedlington, Northumberland NE22
going
print.
© Welwyn
to Welwyn’s own data and is considered accurate at
at time of
7AA,
to
All information is subject
Components
own data and is considered accurate
time of going to UK
print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
TT electronics plc
Issue B · 03.02
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
© TT electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue B · 03.02
Telephone: +44 (0) 1670
10. 11
111
111
General Purpose Power
General Purpose Power
Wirewound Resistors
Wirewound Resistors
PW Series
PW Series
Welwyn Components
Temperature Rise
300
Temperature Rise (°C)
PW-22, 25
PW-15, 18
PW-10
PW-7
PW-5
PW-3
Power Derating
100
Percent of Rated Load
80
60
PW-15, 18, 22, 25
40
20
0
0
50
100
150
200
Ambient Temperature (°C)
250
25 40
85
PW-2
PW-3, 5, 7, 10
250
200
150
100
50
0
0
20 40 60 80 100 120
Percent of Rated Load
Packaging
Resistors are supplied bulk packed. Quantity 500.
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
© TT electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Telephone: +44 (0) 1670
112
Issue B · 03.02
10. 11
General Purpose Power
General
Purpose Power
General
Purpose Power
Wirewound Resistors
Wirewound Resistors
Wirewound Resistors
PW
PW Series
Series
PW Series
Welwyn Components
Welwyn Components
•
20 watts to
·
•
20 watts to
to
watts
50 watts
20
•
0.10 ohms
50
2.0K ohms
watts
50
to
watts
·
•
0.10 ohms to 2.0K ohms
0.10 ohms
or ±5% tolerance
•
or ±5% tolerance
·
±10%
±10%to 2.0K ohms
±10% or
·
•
Customs
±5% tolerance
•
Customs
•
Customs
Electrical Data
Electrical Data
Power rating at 25°C
Power rating at 25°C
Resistance range
Resistance range
watts
PW-20E
PW-30
PW-40
PW-50E
ohms
Please note: When ordering the alternative configuration please add an ‘A’ after the part number. (i.e., PW-2A)
Please note: When ordering the alternative configuration please add an ‘A’ after the part number. (i.e., PW-2A)
Dimensions (Inches)
PW-20E Wirewound
PW-30, 40 and 50E Wirewound
Dimensions (Inches)
A ±0.030
B ±0.060
PW-20E Wirewound
PW-30, 40 and 50E Wirewound
B
PW-20E
A ±0.030 1.875 ±0.060
PW-20EPW-30
1.875 2.00 2.50
PW-30 PW-40
2.00
2.45 2.55
PW-40 PW-50E
2.45 3.075 3.00
PW-50E
3.075
3.625
2.50
2.55
3.00
3.625
0.250 (Typ.)
0.250 (Typ.)
5/32 Dia. Thru (2)
5/32 Dia. Thru (2)
A
0.157±0.020
0.157±0.020
0.5±0.030
0.5±0.030
0.5±0.030
0.5±0.030
A
0.032±0.0025
0.282±0.020
A
0.282±0.020
0.75±0.030
0.75±0.030
0.75±0.030
0.875
0.75±0.030
0.875
B
5/32 Dia. Thru (2)
5/32 Dia. Thru (2)
A
0.032±0.0025
0.032±0.0025
0.25
0.25
B
0.375
0.75
0.75
PW-20E
20
PW-30
30
PW-40
40
PW-50E
50
watts
ohms 20 0R1 to 2K 30 0R5 to 1K2 40 0R65 to 1K5 50 0R08 to 1K8
0R1 to 2K
0R5 to 1K2
0R65 to 1K5
0R08 to 1K8
0.032±0.0025
100
80
60
40
20
0
Percent of Rated Load
Power Derating
100
Power Derating
PW-20E, PW-30, PW-40
Percent of Rated Load
80
60
40
20
50
100
150
200
Ambient Temperature (°C)
50
100
150
200
250
Ambient Temperature (°C)
0
0
250
PW-50E without bracket
PW-20E, PW-30, PW-40
PW-50E without bracket
0.375
0.200 (Typ.)
0.200 (Typ.)
0.135±0.015
0.135±0.015
0.205 or 0.187±0.005
0.069±0.005
0.205 or 0.187±0.005
0.069±0.005
0.25±0.031
0.25±0.031
0.125±0.015
0.125±0.015
0
PW-20E Alternate Terminal Configuration
PW-20E Alternate Terminal Configuration
Printed Circuit Terminal
Printed Circuit Terminal
0.020
0.020
With Bracket:
PW-30 Increased to 40 watts
With Bracket:
PW-30 PW-40 Increased to 50 watts
Increased to 40 watts
PW-40 PW-50 Increased to 60 watts
Increased to 50 watts
PW-50 Increased to 60 watts
PW-15E
PW-15E
0.500±0.030
0.500±0.030
0.250 min.
2.000±0.040
2.000±0.040
0.250 min.
Temperature Rise
Temperature Rise
300
Temperature Rise (°C)
300
Temperature Rise (°C)
250
200
150
100
50
0
0
250
200
150
100
50
0
0
25
PW-30
125
0.500±0.030
PW-50E
PW-50E
PW-20E
PW-20E
PW-40
PW-30
0.500±0.030
0.187±0.010 1.410±0.040
1.410±0.040
0.060 Dia. (2)
0.060 Dia. (2)
PW-40
0.187±0.010
1.050 Min.
1.050 Min.
0.840±0.040
0.840±0.040
50
75
100
Percent of Rated Load
25
50
75
100
125
Percent of Rated Load
General Note
General
Welwyn Components reserves the right to make changes in product specification without notice or liability.
Note
General Note
A subsidiary of
All information is subject to Welwyn’s changes and is considered accurate at time of or liability.
Welwyn Components reserves the right to make own datain product specification without noticegoing to print.
TT electronics plc
TT electronics reserves the right to make changes in product specification without notice or liability.
A subsidiary of
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
TT electronics plc
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
B · 03.02
Issue
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 · 7AA, UK
© Welwyn Components Limited
·· Bedlington, Northumberland NE22Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Telephone: +44 (0) 1670
© TT electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue B · 03.02
10. 11
113
113
General Purpose Power
General Purpose Power
Wirewound Resistors
Wirewound Resistors
PW
Series
PW
Series
Welwyn Components
PW-30E
0.250±0.020
Meniscus allowable to
the termination edge
0.205±0.020
1.106±0.050
0.900±0.050
0.375±0.040
0.062 Rad. (2)
0.125 Rad. (Ref.)
0.155±0.005
0.500±0.030
0.709±0.030
0.273±0.010 Dia.
0.290±0.030
0.685±0.060
1.000±0.040
3.000±0.040
2.375±0.040
0.020
0.313±0.050
0.187±0.020
0.020
0.500±0.040
0.900
±0.050
0.060 Dia. (2)
See Meniscus Note
Packaging
Resistors are supplied bulk packed. Quantity 500.
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© 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
© TT electronics plc
114
Issue B · 03.02
10. 11
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