WA84F Datasheet, PDF (2/2 Pages) Welwyn Components Limited – Fusible Wirewound Resistors

Fusible Wirewound
Resistors
WA84F
Welwyn Components
Performance Data
Load at rated power: 1000 hrs at 25 or 70°C
Dry heat: 1000 hrs at 200°C
Derating from rated power at 25°C
Short term overload - 2.5 x rated power for 5 seconds
D.H.S.S.
Climatic
Pulse handling
∆ R%
∆ R%
∆ R%
∆ R%
∆ R%
Fusing characteristics for constant voltage
100.0
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0
0
for
R20 to 30R
5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0
Multiple of rated power
Packaging
The standard method of packaging is taped in ammo packs.
Can be provided on reels by request.
The critical dimensions are shown in figure 2.
Component wires will not protrude beyond the outside edge
of the tapes.
Alternative packaging available by special request are detailed
in table opposite.
Figure 2
10
Maximum
Typical
5.0
3.0
5.0
3.0
zero at 275°C
5.0
2.0
5.0
2.0
5.0
1.0
Data available by request
Fusing characteristics for constant current
100.0
90.0
80.0
70.0
for
2R1 to 30R
60.0
50.0
40.0
for
R20 to 2R
30.0
20.0
10.0
0
0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0
Multiple of rated power
130
120
110
100
90
80
70
60
50
40
30
20
10
0
20
WA84F Series Derating Curve
40 60 80 100 120 140 160 180 200 220 240 260 280
Temp°C
f₁
6
67
f₂
6
Body Location f₁ – f₂ ≤ 1.4 mm
Standard Quantities Per Package
Type
Reel
Large ammo pack
WA84F
1000
1000
Type
b
WA84F
67
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: [phone] · Facsimile: [phone] · Email: [e-mail] · Website: www.welwyn-tt.com
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