SWT/EWT Series
Stackpole Electronics, Inc.
Non-Flammable Edgewound Tubular Wirewound
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Features:
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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
EWT – Vitreous enamel coating provides temperature
handling up to 500ºC
Electrical Specifications
Power Rating
(Watts) @ 70ºC
Type / Code
Dielectric
Strength
VAC
Ohmic Range and Tolerance
5% and 10%
NSWT
SWT
SWT
12
/
EWT
12
12W
1,000
0.1Ω
SWT
25
/
EWT
25
25W
2,500
1Ω
SWT
50
/
EWT
-
EWT
-
0.1Ω
-
53Ω
0.1Ω
-
5KΩ
30KΩ
-
51KΩ
0.1Ω
-
100Ω
0.1Ω
-
10KΩ
50KΩ
50
50W
2,500
0.1Ω
0.1Ω
-
275Ω
0.1Ω
-
20KΩ
SWT 100 / EWT 100
100W
2,500
0.1Ω - 100KΩ
0.12Ω
-
680Ω
0.1Ω
-
50KΩ
SWT 150 / EWT 150
150W
2,500
0.1Ω - 150KΩ
0.22Ω
-
1.5KΩ
0.1Ω
-
80KΩ
SWT 175 / EWT 175
175W
2,500
0.15Ω - 100KΩ
0.24Ω
-
1.3KΩ
0.1Ω - 100KΩ
SWT 200 / EWT 200
200W
2,500
0.1Ω - 200KΩ
0.25Ω - 1.35KΩ
0.1Ω - 120KΩ
SWT 225 / EWT 225
225W
2,500
0.2Ω - 130KΩ
0.3Ω
-
1.7KΩ
0.12Ω - 130KΩ
SWT 250 / EWT 250
250W
2,500
0.5Ω - 250KΩ
0.33Ω
-
1.8KΩ
0.5Ω - 200KΩ
SWT 300 / EWT 300
300W
2,500
0.5Ω - 300KΩ
0.42Ω - 2.25KΩ
0.5Ω - 240KΩ
SWT 400 / EWT 400
400W
2,500
0.5Ω - 400KΩ
0.54Ω
3KΩ
0.5Ω - 300KΩ
SWT 500 / EWT 500
500W
2,500
0.5Ω - 500KΩ
0.77Ω
4.2KΩ
0.5Ω - 400KΩ
SWT 700 / EWT 700
700W
2,500
1Ω
1Ω
5.3KΩ
1Ω
-
500KΩ
SWT 1000 / EWT 1000
1000W
2,500
1Ω
-
750KΩ
SWT 1300 / EWT 1300
1300W
2,500
1Ω
-
600KΩ
-
-
1MΩ
1.3MΩ
-
1.4Ω
-
7.6KΩ
1Ω
2Ω
-
10KΩ
1Ω
-
1MΩ
How to Order
SEI Type
Code
Nominal
Resistance
Tolerance
Packaging
EWT
Type
SWT
EWT
NSWT
Termination
M
50
200
5%
B
Code
Description
Std Tab Connection
M
Mounting Hardware
S
Spring Clips
L
Welded Straight Leads
Power Rating
12
225
25
250
50
300
100
400
150
500
175
700
200 1000
1300
Tolerance
5%
10%
Code Description
B
Bulk
Description
Silicone Coating (std)
Vitreous Enamel
Non-Inductive Silicone Coating
Rev Date: 10/16/2009
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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