Tubular Vitreous Enamelled
Wirewound Resistors
1600/1900 Series
Welwyn Components
Electrical Data (continued)
Table 1
*Dissipation (watts) to
produce operating
Resistance range (ohms)
Limiting
Low inductance
winding resistance
range (ohms)
element
voltage
hotspot temperature (°C) of:
Ambient = 20°C
Ambient
= 70°C
Minimum
Termination
style
Min. res. at
resistance at
Max. at
any
Max. at
Type
either
200
5
300
10
375
375
11
5%
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
tolerance
15k
C
All others
150
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
tolerance
1601
1905
1600
1602
1906
1603
1604
1605
1908
1607
1606
1608
1609
14
20
250
-
1.3k
3.5k
5.0k
4.0k
5.5k
7.5k
11.5k
14k
7
14.5
15
16
1
30k
450
7.5
8
21
16.5
17
1
56k
-
600
15.5
19
22
1
43k
500
700
850
1300
1100
1200
1300
2100
2100
3000
350
9.5
11
15.5
21
24
34
41
52
74
28
22
1
50k
550
22
32
25
1
83k
750
31
45
35
1
100k
100k
100k
100k
160k
180k
250k
1000
900
41
59
47
1
47
68
54
1
1000
900
16k
66
95
76
1
22k
80
115
145
208
91
1
1900
1800
2500
32k
101
145
115
165
1
38k
1
58k
*The stated dissipation applies to resistors mounted horizontally with unobstructed bore.
Performance Data
Max
Typ
Load : 1000 hours at 70°C
Shelf life : 12 months at room temperature
Climatic
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
5.0
1.0
0.5
0.2
0.1
zero
3.5
0.1
0.35
0.05
0.02
zero
Long term damp heat
Bump and vibration
Noise (in a decade of frequency)
Pulse Handling Data
Available by request
© 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
Issue E · 10.05
122