GWK
Vishay Draloric
Vitreous Wirewound Resistors with Ferrules
FEATURES
• Caps made from drawn brass, nickel plated (GZK style)
• Machined caps with inner thread available (GDK style)
• Easy to change when mounted with spring clips
• Complete vitreous coating for perfect humidity protection
• TCR 100. . .180 ppm/K - WM110 (Class 3)
• Lead (Pb)-free
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
POWER RATING
P
40
°
C
W
10
280
LIMITING
VOLTAGE
V
RESISTANCE
RANGE
TOLERANCE
±
%
10
5
2
10
5
10
5
2
10
5
10
5
2
10
5
10
5
2
10
5
10
5
2
10
5
10
5
2
10
5
10
5
2
10
5
10
5
2
10
5
E 12
E 24
E 24
E 12
E 24
E 12
E 24
E 24
E 12
E 24
E 12
E 24
E 24
E 12
E 24
E 12
E 24
E 24
E 12
E 24
E 12
E 24
E 24
E 12
E 24
E 12
E 24
E 24
E 12
E 24
E 12
E 24
E 24
E 12
E 24
E 12
E 24
E 24
E 12
E 24
E-SERIES
Ω
1R8 - 16K
6R8 - 16K
270R - 16K
2R4 - 1K0
15R - 1K0
2R2 - 27K
12R - 27K
360R - 27K
4R7 - 1K8
20R - 1K8
3R3 - 43K
12R - 43K
470R - 43K
6R8 - 2K7
20R - 2K7
6R2 - 82K
6R2 - 82K
47R - 82K
13R - 5K1
13R - 5K1
8R2 - 82K
8R2 - 82K
47R - 82K
27R - 10K
27R - 10K
12R - 110K
12R - 110K
30R - 110K
36R - 15K
36R - 15K
20R - 180K
20R - 180K
20R - 180K
56R - 22K
56R - 22K
36R - 330K
36R - 330K
36R - 330K
100R - 43K
100R - 43K
GWK 10
GWK 10 Ni
GWK 20
7
20
GWK 20 Ni
GWK 40
13
30
400
580
GWK 40 Ni
GWK 60
20
40
850
GWK 60 Ni
GWK 100
25
80
1200
GWK 100 Ni
GWK 150
50
100
1600
GWK 150 Ni
GWK 200
60
160
2300
GWK 200 Ni
GWK 300
100
260
4000
GWK 300 Ni
180
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For technical questions, contact ww1resistors@vishay.com
Document Number 21006
Revision 22-Mar-06
GWK
Vitreous Wirewound Resistors with Ferrules
DIMENSIONS
D
ø 7.5
±
0.5
[0.295
±
0.020]
1.5
[0.059]
M2
ø7
[0.276]
11
[0.433]
46
±
1
[1.811
±
0.039]
L
L
K
d
D
K
Vishay Draloric
Figure 1: GWK 10
Figure 2: GWK 20...GWK 300
MODEL
GWK 10
GWK 10 Ni
D
L
D
K
L
K
d
See Drawing Figure 1
DIMENSIONS
in millimeters [inches]
GWK 20
GWK 20 Ni
12.3
±
0.8
[0.484
±0.031
]
51
±1.3
[2.008
±0.051
]
11 [0.433]
10 [0.394]
4.5 [0.177]
GWK 40
GWK 40 Ni
15.3
±0.8
[0.602
±0.031
]
61
±1.5
[2.402
±0.059
]
14 [0.551]
13 [0.512]
5.5 [0.217]
GWK 60
GWK 60 Ni
15.3
±0.8
[0.602
±0.031
]
81
±2
[3.189
±0.079
]
14 [0.551
13 [0.512]
5.5 [0.217]
MODEL
GWK100
GWK 100 Ni
D
L
D
K
L
K
d
22
±1
[0.866
±0.039
]
101
±2.5
[3.976
±0.098
]
21 [0.827]
16 [0.63]
10 [0.394]
DIMENSIONS
in millimeters [inches]
GWK 150
GWK 150 Ni
22
±1
[0.866
±0.039
]
121
±3
[4.764
±0.118
]
21 [0.827]
16 [0.63]
10 [0.394]
GWK 200
GWK 200 Ni
22
±1
[0.866
±0.039
]
166.5
±4.2
[6.555
±0.165
]
21 [0.827]
16 [0.63]
10 [0.394]
GWK 300
GWK 300 Ni
22
±1
[0.866
±0.039
]
266.5
±6.7
[10.492
±0.264
]
21 [0.827]
16 [0.63]
10 [0.394]
ORDERING INFORMATION
GWK
MODEL
100
SIZE
SET FREE FOR DRAWN
CAPS OR ADD
“M4”
FOR
MACHINED CAPS WITH
INNER THREAD
M4 (M4
IS STANDARD, OTHER
THREADS AVAILABLE)
100R
RESISTANCE VALUE
Ω
±
5 %
TOLERANCE
±
%
Document Number 21006
Revision 22-Mar-06
For technical questions, contact ww1resistors@vishay.com
www.vishay.com
93
GWK
Vishay Draloric
RATED POWER IN %
120
100
80
60
40
20
0
Vitreous Wirewound Resistors with Ferrules
TEMPERATURE RISE IN
°
C
500
400
300
200
100
0
0
2
4
6
8
10
GWK 10
- 55
50
40
150
250
350
Derating
TEMPERATURE RISE IN
°
C
500
AMBIENT TEMPERATURE IN
°
C
Temperature Rise
TEMPERATURE RISE IN
°
C
500
GWK 40
400
300
200
100
0
POWER IN W
GWK 20
400
300
200
100
0
0
5
10
15
20
25
0
10
20
30
40
50
Temperature Rise
TEMPERATURE RISE IN
°
C
500
400
300
200
100
0
POWER IN W
Temperature Rise
TEMPERATURE RISE IN
°
C
500
400
300
200
100
0
GWK 100
POWER IN W
GWK 60
0
10
20
30
40
50
0
20
40
60
80
100
Temperature Rise
TEMPERATURE RISE IN
°
C
500
400
POWER IN W
Temperature Rise
TEMPERATURE RISE IN
°
C
500
400
300
200
100
0
GWK 200
POWER IN W
GWK 150
300
200
100
0
GWK 300
0
20
40
60
80
100
0
40
80
120
160
200
Temperature Rise
POWER IN W
Temperature Rise
POWER IN W
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94
For technical questions, contact ww1resistors@vishay.com
Document Number 21006
Revision 22-Mar-06
GWK
Vitreous Wirewound Resistors with Ferrules
PULSE HANDLING FOR SHORT PULSES
(less than 100 milliseconds)
For single pulsed up to 100 milliseconds duration time the following energy resistance chart can be used to calculate the
energy a resistor can handle. Look to the resistance value or the next higher value of the model you need and follow this row
to the energy per ohm column to the left. The energy per ohm value multiplied by the resistance value is the energy the
resistor can handle for 100 milliseconds. This energy divided by .1 ms is the power the resistor can handle for 100
milliseconds. For the power the resistor can handle for 10 milliseconds needed divide the energy by .01. The maximum pulse
power is limited at 625 x rated power.
Do not use this chart for GWK...ni styles. For more information and assistance please contact factory.
Vishay Draloric
ENERGY RESISTANCE CHART
GWK10
GWK 20
GWK 40
GWK 60
GWK 100
GWK 150
GWK 200
GWK 300
ENERGY/
Ω
[Ws/
Ω
]
1.17E - 04
1.17E - 04
1.72E - 04
2.88E - 04
4.53E - 04
7.72E - 04
1.24E - 03
1.91E - 03
3.06E - 03
5.05E - 03
8.11E - 03
1.31E - 02
2.06E - 02
3.56E - 02
5.77E - 02
1.34E - 01
2.14E - 01
3.47E - 01
5.96E - 01
9.93E - 01
1.54E + 00
2.52E + 00
4.00E + 00
6.58E + 00
1.12E + 01
R [
Ω
]
16.0K
13.0K
9.1K
6.2K
4.3K
3.0K
2.2K
1.5K
1.1K
330
220
160
110
75
56
43
30
20
15
10
7.5
5.1
3.9
2.7
1.8
ENERGY/
Ω
[Ws/
Ω
]
1.15E - 04
1.16E - 04
1.70E - 04
2.83E - 04
4.47E - 04
7.65E - 04
1.23E - 03
1.87E - 03
3.00E - 03
4.79E - 03
7.61E - 03
1.23E - 02
2.01E - 02
3.24E - 02
5.30E - 02
1.24E - 01
1.98E - 01
3.14E - 01
5.48E - 01
8.86E - 01
1.38E + 00
2.21E + 00
3.48E + 00
5.64E + 00
9.11E + 00
1.56E + 01
R [
Ω
]
27.0K
2.40K
16.0K
11.0K
7.5K
5.1K
3.9K
2.7K
1.8K
560
390
300
200
150
100
75
51
36
24
18
13
9.1
6.8
4.7
3.6
2.2
ENERGY/
Ω
[Ws/
Ω
]
1.15E - 04
1.15E - 04
1.69E - 04
2.82E - 04
4.45E - 04
7.58E - 04
1.22E - 03
1.86E - 03
2.98E - 03
4.70E - 03
7.44E - 03
1.19E - 02
1.94E - 02
3.16E - 02
5.10E - 02
1.21E - 01
1.90E - 01
3.00E - 01
5.22E - 01
8.41E - 01
1.29E + 00
2.05E + 00
3.26E + 00
5.26E + 00
8.50E + 00
1.42E + 01
R [
Ω
]
43.0K
36.0K
24.0K
18.0K
11.0K
8.2K
5.6K
3.9K
2.7K
820
560
430
300
200
150
110
75
56
36
27
20
15
10
6.8
5.1
3.3
ENERGY/
Ω
[Ws/
Ω
]
1.15E - 04
1.15E - 04
1.68E - 04
2.81E - 04
4.42E - 04
7.54E - 04
1.21E - 03
1.84E - 03
2.95E - 03
4.58E - 03
7.20E - 03
1.17E - 02
1.89E - 02
3.04E - 02
4.93E - 02
7.49E - 02
1.17E - 01
1.83E - 01
2.88E - 01
4.96E - 01
7.98E - 01
1.23E + 00
1.93E + 00
3.05E + 00
4.84E + 00
7.86E + 00
1.29E + 01
R [
Ω
]
82.0K
68.0K
43.0K
33.0K
22.0K
15.0K
11.0K
7.5K
5.1K
1.6K
1.1K
750
560
390
270
220
200
150
100
68
51
36
27
18
13
9.1
6.2
ENERGY/
Ω
[Ws/
Ω
]
2.80E - 04
2.80E - 04
4.41E - 04
7.52E - 04
1.20E - 03
1.84E - 03
2.93E - 03
4.53E - 03
7.12E - 03
1.14E - 02
1.85E - 02
2.98E - 02
4.81E - 02
1.14E - 01
1.79E - 01
2.81E - 01
4.81E - 01
7.75E - 01
1.19E + 00
1.87E + 00
2.92E + 00
4.61E + 00
7.46E + 00
1.21E + 01
1.97E
±
01
R [
Ω
]
82.0K
62.0K
43.0K
30.0K
22.0K
15.0K
10.0K
3.0K
2.2K
1.6K
1.1K
750
560
390
300
200
150
100
68
51
36
27
18
12
8.2
ENERGY/
Ω
[Ws/
Ω
]
2.80E - 04
2.80E - 04
4.40E - 04
7.51E - 04
1.20E - 03
1.83E - 03
2.93E - 03
4.51E - 03
7.09E - 03
1.14E - 02
1.84E - 02
2.97E - 02
4.78E - 02
1.14E - 01
1.78E - 01
2.79E - 01
4.79E - 01
7.69E - 01
1.17E + 00
1.85E + 00
2.89E + 00
4.56E + 00
7.36E + 00
1.19E + 01
1.93E + 01
R [
Ω
]
110K
82.0K
56.0K
39.0K
30.0K
20.0K
15.0K
4.3K
3.0K
2.0K
1.5K
1.0K
750
560
390
270
180
130
100
68
47
36
24
18
12
ENERGY/
Ω
[Ws/
Ω
]
2.80E - 04
2.80E - 04
4.40E - 04
7.51E - 04
1.20E - 03
1.83E - 03
2.93E - 03
4.49E - 03
7.05E - 03
1.13E - 02
1.83E - 02
2.94E - 02
4.75E - 02
7.23E - 02
1.13E - 01
1.77E - 01
2.77E - 01
4.75E - 01
7.62E - 01
1.17E + 00
1.83E + 00
2.85E + 00
4.50E + 00
7.24E + 00
1.17E + 01
1.89E + 01
R [
Ω
]
180K
130K
91.0K
62.0K
47.0K
33.0K
22.0K
6.8K
4.7K
3.3K
2.4K
1.6K
1.2K
1.0K
910
620
430
300
220
150
110
82
56
39
27
20
ENERGY/
Ω
[Ws/
Ω
]
2.79E - 04
2.80E - 04
4.40E - 04
7.50E - 04
1.20E - 03
1.83E - 03
2.92E - 03
4.48E - 03
7.04E - 03
1.13E - 02
1.83E - 02
2.94E - 02
4.73E - 02
7.20E - 02
1.13E - 01
1.76E - 01
2.76E - 01
4.72E - 01
7.57E - 01
1.16E + 00
1.81E + 00
2.82E + 00
4.45E + 00
7.16E + 00
1.15E + 01
1.86E + 01
R [
Ω
]
330K
240K
160K
120K
82.0K
62.0K
39.0K
12.0K
9.1K
6.2K
4.3K
3.0K
2.2K
1.8K
1.6K
1.1K
750
560
390
270
200
150
100
68
51
36
Document Number 21006
Revision 22-Mar-06
For technical questions, contact ww1resistors@vishay.com
www.vishay.com
95
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1
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