SWT/EWT Series
Non-Flammable Edgewound Tubular Wirewound Resistor
Features:
•
•
•
•
•
•
•
•
Stackpole Electronics, Inc.
Resistive Product Solutions
High current capability
RoHS compliant / lead-free
Non-inductive style only available with silicone coating
(NSWT)
Suitable for soldering or thru bolt connections
Wirewound ribbon on ceramic substrate
SWT – Silicone coating provides temperature handling up
to 350ºC
SWTA – Adjustable version
EWT – Vitreous enamel coating provides temperature
handling up to 500ºC
Electrical Specifications
Type / Code
SWT12 / EWT12
SWT25 / EWT25
SWT50 / EWT50
SWT100 / EWT100
SWT150 / EWT150
SWT175 / EWT175
SWT200 / EWT200
SWT225 / EWT225
SWT250 / EWT250
SWT300 / EWT300
SWT400 / EWT400
SWT500 / EWT500
SWT700 / EWT700
SWT1000 / EWT1000
SWT1300 / EWT1300
Power Rating
(Watts) @ 70ºC
12W
25W
50W
100W
150W
175W
200W
225W
250W
300W
400W
500W
700W
1000W
1300W
Dielectric
Strength
VAC
1,000
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
100
Ohmic Range (Ω) and Tolerance
SWT
0.1 - 51K
1 - 30K
0.1 - 50K
0.1 - 100K
0.1 - 150K
0.15 - 100K
0.1 - 200K
0.2 - 130K
0.5 - 125K
0.5 - 150K
0.5 - 200K
0.5 - 250K
1 - 350K
1 - 500K
1 - 600K
NSWT
0.1 - 53
0.1 - 100
0.1 - 275
0.12 - 680
0.22 - 1.5K
0.24 - 1.3K
0.25 - 1.35K
0.3 - 1.7K
0.33 - 1.8K
0.42 - 2.25K
0.54 - 3K
0.77 - 4.2K
1 - 5.3K
1.4 - 7.6K
2 - 10K
EWT
0.1 - 5K
0.1 - 10K
0.1 - 20K
0.1 - 50K
0.1 - 80K
0.1 - 100K
0.1 - 120K
0.12 - 130K
0.5 - 200K
0.5 - 240K
0.5 - 300K
0.5 - 400K
1 - 500K
1 - 750K
1 - 1M
Power Derating Curve:
Percent Rated Power (%)
80
60
40
20
25
30
100
150
200
250
300
350
Ambient Temperature (ºC)
Rev Date: 01/17/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
1
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SWT/EWT Series
Non-Flammable Edgewound Tubular Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Mechanical Specifications
Type / Code(1)
SWT12 / EWT12
SWT25 / EWT25
SWT50 / EWT50
SWT100 / EWT100
SWT150 / EWT150
SWT175 / EWT175
SWT200 / EWT200
SWT225 / EWT225
SWT250 / EWT250
SWT300 / EWT300
SWT400 / EWT400
SWT500 / EWT500
SWT700 / EWT700
SWT1000 / EWT1000
SWT1300 / EWT1300
0.31
7.94
0.56
14.30
0.56
14.30
0.75
19.10
1.10
28.00
1.13
28.60
1.38
35.00
1.13
28.60
1.57
40.00
1.57
40.00
1.57
40.00
1.97
50.00
1.97
50.00
2.36
60.00
2.56
65.00
OD
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.19
4.76
0.31
7.94
0.31
7.94
0.50
12.70
0.75
19.10
0.75
19.10
0.75
19.10
0.75
19.10
0.98
25.00
0.98
25.00
0.98
25.00
1.38
35.00
1.38
35.00
1.57
40.00
1.65
42.00
ID
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.47
12.00
0.47
12.00
0.75
19.00
0.67
17.00
0.67
17.00
0.67
17.00
0.67
17.00
0.71
18.00
0.79
20.00
0.79
20.00
0.79
20.00
0.98
25.00
0.98
25.00
1.18
30.00
1.18
30.00
F
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
0.04
1.00
1.75
44.50
2.01
51.00
4.02
102.00
6.50
165.00
8.11
206.00
8.50
216.00
8.74
222.00
10.51
267.00
8.27
210.00
10.24
260.00
12.99
330.00
12.99
330.00
18.11
460.00
21.26
540.00
25.59
650.00
L
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
0.08
2.00
Unit
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
(1) EWT and NSWT series will have the same Mechanical Specifications as SWT series
Rev Date: 01/17/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
2
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marketing@seielect.com
SWT/EWT Series
Non-Flammable Edgewound Tubular Wirewound Resistor
Hardware:
•
•
Stackpole Electronics, Inc.
Resistive Product Solutions
Sturdy plated steel brackets, thru-bolts, centering washers, and insulating washers
Brackets provide elongated mounting holes for ease of mounting
Mounting Brackets Mechanical Specifications
Resistor Power Rating
12W
25W
50W
100W
150W
175W
200W
225W
250W
300W
400W
500W
700W
1000W
1300W
A
1.00
25.40
1.00
25.40
1.00
25.40
1.00
25.40
1.50
38.10
1.50
38.10
1.50
38.10
1.50
38.10
1.50
38.10
1.50
38.10
1.50
38.10
3.00
76.20
1.50
38.10
3.00
76.20
3.00
76.20
B
0.75
19.05
0.75
19.05
0.75
19.05
0.75
19.05
0.88
22.23
0.88
22.23
0.88
22.23
0.88
22.23
0.88
22.23
0.88
22.23
0.88
22.23
1.50
38.10
0.88
22.23
1.50
38.10
1.50
38.10
C
0.50
12.70
0.50
12.70
0.50
12.70
0.50
12.70
1.25
31.75
1.25
31.75
1.25
31.75
1.25
31.75
1.25
31.75
1.25
31.75
1.25
31.75
2.50
63.50
1.25
31.75
2.50
63.50
2.50
63.50
D
0.22
5.56
0.22
5.56
0.22
5.56
0.22
5.56
0.28
7.14
0.28
7.14
0.28
7.14
0.28
7.14
0.28
7.14
0.28
7.14
0.28
7.14
0.41
10.3
0.28
7.14
0.41
10.30
0.41
10.30
E
0.44
11.13
0.44
11.13
0.44
11.13
0.44
11.13
0.56
14.30
0.56
14.30
0.56
14.30
0.56
14.30
0.56
14.30
0.56
14.30
0.56
14.30
-
-
0.56
14.30
-
-
-
-
Units
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
Rev Date: 01/17/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
3
www.seielect.com
marketing@seielect.com
SWT/EWT Series
Non-Flammable Edgewound Tubular Wirewound Resistor
Metal Centering Washer
Stackpole Electronics, Inc.
Resistive Product Solutions
Mica Insulating Washer
Bolt and Washers Mechanical Specifications
Resistor Power Rating
12W
25W
50W
100W
150W
175W
200W
225W
250W
300W
400W
500W
700W
1000W
1300W
OD
0.31
7.95
0.56
14.30
0.56
14.30
0.75
19.10
1.10
28.00
1.13
28.60
1.38
35.00
1.13
28.60
1.57
40.00
1.57
40.00
1.57
40.00
2.50
63.50
1.97
50.00
2.50
63.50
2.56
65.00
Core Length
1.75
44.40
2.01
51.00
4.02
102.00
6.50
165.00
8.11
206.00
8.50
216.00
8.74
222.00
10.51
267.00
8.74
222.00
10.71
272.00
13.46
342.00
12.01
305.00
18.19
462.00
20.00
508.00
26.26
667.00
Bolt Length
2.25
57.15
2.50
63.50
4.75
120.65
7.00
177.80
7.75
196.85
9.13
231.78
9.25
234.95
11.25
285.75
9.25
234.95
11.13
282.58
14.00
355.60
12.50
317.50
18.75
476.25
20.50
520.70
27.00
685.80
Bolt No.
8
10
10
10
0.25"
0.25"
0.25"
0.25"
0.5"
0.5"
0.5"
0.5"
0.5"
0.5"
0.5"
A
0.31
7.95
0.56
14.22
0.56
14.22
0.75
19.05
1.12
28.58
1.12
28.58
1.40
35.56
1.12
28.58
1.57
39.88
1.57
39.88
1.57
39.88
2.50
63.50
1.97
50.04
2.50
63.50
2.56
65.02
B
-
-
0.19
4.83
0.19
4.83
0.19
4.83
0.25
6.35
0.25
6.35
0.25
6.35
0.25
6.35
0.50
12.70
0.50
12.70
0.50
12.70
0.50
12.70
0.50
12.70
0.50
12.70
0.50
12.70
C
-
-
0.75
19.05
0.75
19.05
1.00
25.40
1.25
31.75
1.50
38.10
1.50
38.10
1.50
38.10
2.00
50.80
2.00
50.80
2.00
50.80
3.00
76.20
2.25
57.15
3.00
76.20
3.00
76.20
D
-
-
0.31
7.95
0.31
7.95
0.50
12.70
0.62
15.88
0.75
19.05
0.75
19.05
0.75
19.05
1.00
25.40
1.00
25.40
1.00
25.40
1.50
38.10
1.25
31.75
1.50
38.10
1.50
38.10
Units
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
Rev Date: 01/17/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
4
www.seielect.com
marketing@seielect.com
SWT/EWT Series
Non-Flammable Edgewound Tubular Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Spring Clip Mechanical Specifications
Resistor Power Rating
12W
25W
50W
A
0.28
7.14
0.63
15.88
0.63
15.88
B
0.25
6.35
0.25
6.35
0.25
6.35
C
0.34
8.74
0.47
11.91
0.47
11.91
D
0.19
4.78
0.31
7.95
0.31
7.95
Units
inches
mm
inches
mm
inches
mm
Rev Date: 01/17/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
5
www.seielect.com
marketing@seielect.com
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