Aluminium Housed
Aluminium Housed
Wirewound Resistors
WH Series
Wirewound Resistors
Physical Data
Dimensions (mm) & Weight (g)
WH5, 10, 25 & 50
A
Type
Max
WH5
WH10
WH25
WH50
30
36.5
51
1
B
±0.3
12.4
15.9
19.8
21.4
B
Max
88
145.7
184.4
C
±0.3
11.3
14.3
18.3
39.7
C
Max
24.1
41.8
41.8
D
Max
27.3
45.5
45.5
E
Min
1.9
1.9
2.8
2.8
E
Max
65.2
89.7
127.7
F
Max
17
21
28
30
F
±0.3
35
70
104
G
Max
9
11
15
16
G
±0.3
37
57.2
59
H
Dia ±0.2
2.4
2.4
3.3
3.3
H
Max
11.8
20.5
20.5
L
Max
17.0
21.0
29.0
51.0
J
Max
15.4
10.4
12.4
M
±0.5
4.3
5.2
7.2
7.9
K
Max
3.7
5.5
5.5
L
3
Nom
4.4
5.1
6.6
N
Max
1.8
2.2
2.6
2.6
M
Max
-
103.4
141.4
Dt
Min
2.5
2.9
4.3
5.1
Dt
Min
7.0
15
15
Wt.
Nom
3.6
5.6
13
29
Wt.
Nom
115
475
700
72.5
2
WH100, 200 & 300
A
Max
47.5
WH100
WH200
WH300
72.5
72.5
Note 1: A
max
for WH25T is 71.3
Note 2: A
max
for WH50T is 95.5
Note 3: WH100: ±0.25, WH200 & 300: ±0.45
WH5, 10, 25 & 50
WH100
WH200 & 300
Spade terminal on
WH25T & WH50T
Nominal dims in mm
End face tracking distance = Dt
Construction
Cap and lead assemblies are fitted to a high purity
ceramic substrate. The resistive element is wound onto
the substrate and welded to the caps. The wound rod is
then moulded and fitted into aluminium housing to give
optimum stability and reliability.
Marking
The resistors are legend marked with type reference,
resistance value and tolerance which will withstand all
accepted industrial cleaning fluids. Values are marked
in accordance with IEC 62
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own test data and is considered accurate at time of print.
General Note
Welwyn
Components Limited
TT electronics reserves the right
Bedlington, Northumberland, NE22 7AA, England. Tel: 01670
Welwyn Electronics Park,
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.
General Note
822181 Fax: 01670 829465 Web: www.welwyn-tt.com
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
07. 12
WELWYN [ WELWYN COMPONENTS LIMITED ]
