Tubular Vitreous Enamelled
Wirewound Resistors
1600/1900 Series
Welwyn Components
Electrical Data
Table 1
(continued)
*Dissipation (watts) to
produce operating
hotspot temperature (°C) of:
Ambient = 20°C
Ambient
= 70°C
Resistance range (ohms)
Limiting
element
voltage
Low inductance
winding resistance
range (ohms)
Min. res. at
Max. at
Minimum
resistance at
Max. at
any
tolerance
15k
30k
56k
43k
50k
83k
100k
100k
100k
100k
160k
180k
250k
Termination
style
Type
200
1601
1905
1600
1602
1906
1603
1604
1605
1908
1607
1606
1608
1609
5
7
7.5
8
9.5
11
15.5
21
24
34
41
52
74
300
10
14.5
15
15.5
19
22
31
41
47
66
80
101
145
375
14
20
21
22
28
32
45
59
68
95
115
145
208
375
11
16
16.5
17
22
25
35
47
54
76
91
115
165
±5%
1
1
1
1
1
1
1
1
1
1
1
1
1
±2%
15
15
15
20
20
20
20
30
30
30
30
30
35
±1%
25
30
30
25
30
30
60
40
40
50
40
50
50
C
250
-
-
500
700
850
1300
1100
1200
1300
2100
2100
3000
All others
150
450
600
350
550
750
1000
900
1000
900
1900
1800
2500
±10%
10
10
10
10
10
10
15
15
10
15
15
20
30
±5%
50
50
50
50
50
50
50
50
50
50
50
50
100
either
tolerance
1.3k
3.5k
5.0k
4.0k
5.5k
7.5k
11.5k
14k
16k
22k
32k
38k
58k
*The stated dissipation applies to resistors mounted horizontally with unobstructed bore.
Performance Data
Max
Load : 1000 hours at 70°C
Shelf life : 12 months at room temperature
Climatic
Long term damp heat
Bump and vibration
Noise (in a decade of frequency)
Pulse Handling Data
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
5.0
1.0
0.5
0.2
0.1
zero
Available by request
Typ
3.5
0.1
0.35
0.05
0.02
zero
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
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Issue E · 10.05
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