SWT/EWT Series —
Non-Flammable Edgewound Tubular Wire
Wound
Features
• High current capability
• RoHS compliant / Lead-free
• Suitable for soldering or thru bolt connections
• Wirewound Ribbon on ceramic substrate
• Refer to appropriate mounting spec sheet for non standard tab connections
• SWT -Silicone coating provides Power Derating to 350°C
• EWT -Vitreous Enamel coating provides Power Derating to 500°C
Electrical Specifications
Type / Code*
Power Rating
(Watts)
@ 70°C
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
Ohmic Range and Tolerance
5%, 10%
0.1Ω
−
51KΩ
1Ω
−
30KΩ
0.1Ω
−
50KΩ
0.1Ω
−
100KΩ
0.1Ω
−
150KΩ
0.15Ω
−
100KΩ
0.1Ω
−
200KΩ
0.2Ω
−
130KΩ
0.5Ω
−
250KΩ
0.5Ω
−
300KΩ
0.5Ω
−
400KΩ
0.5Ω
−
500KΩ
1Ω
−
600KΩ
1Ω
−
1MΩ
1Ω
−
1.3MΩ
SWT 12
SWT 25
SWT 50
SWT 100
SWT 150
SWT 175
SWT 200
SWT 225
SWT 250
SWT 300
SWT 400
SWT 500
SWT 700
SWT 1000
SWT 1300
*EWT will have the same Electrical performance as SWT series
How to Order
EWT
SEI Type
Type
SWT
EWT
Description
Silicone Coating (Std)
Vitreous Enamel
M
Termination
Code
-
M
S
L
50
Code
Description
Std Tab Connection
Mounting
Hardware
1
Clips
1
Spring
200
Nominal Resistance
Power Rating
12
25
50
100
150
175
200
225
250
300
400
500
700
1000
5%
Tolerance
B
Packaging
Code
B
Description
Bulk
Tolerance
5%
10%
Welded Straight Leads
1
Order
1300
appropriate mounting Part Numner
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
77
email: marketing@seielect.com
Rev 06/08
SWT/EWT Series — Non-Flammable Edgewound Tubular
Wire Wound
.
Mechanical Specifications
Type / Code*
Tolerance
SWT12
SWT25
SWT50
SWT100
SWT150
SWT175
SWT200
SWT225
SWT250
SWT300
SWT400
SWT500
SWT700
SWT1000
SWT1300
OD
±
0.04
±
1.0
0.31
7.94
0.56
14.3
0.56
14.3
0.75
19.1
1.10
28.0
1.13
28.6
1.38
35.0
1.125
28.6
1.57
40.0
1.57
40.0
1.57
40.0
2.50
63.5
1.97
50.0
2.50
63.5
2.56
65.0
ID
±
0.04
±
1.0
0.188
4.76
0.31
7.94
0.31
7.94
0.50
12.7
0.75
19.1
0.75
19.1
0.75
19.1
0.75
19.1
1.125
28.6
1.125
28.6
1.125
28.6
1.75
44.5
1.41
35.7
1.75
44.5
1.75
44.5
F
±
0.04
±
1.0
0.47
12.0
0.47
12.0
0.75
19.0
0.67
17.0
0.67
17.0
0.67
17.0
0.67
17.0
0.71
18.0
0.71
18.0
0.71
18.0
0.71
18.0
1.10
28.0
1.10
28.0
1.18
30.0
1.18
30.0
L
±
0.08
±
2.0
1.75
44.4
2.00
51.0
4.00
102
6.50
165
7.11
206
8.50
216
8.74
222
10.5
267
8.74
222
10.71
272
13.46
342
12.00
305
18.18
462
20.00
508
26.26
667
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
inches
mm
*EWT series will have the same Mechanical Specifications as SWT series
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
78
email: marketing@seielect.com
Rev 06/08
