Cement Coated Surface
Mount Wirewound Resistors
WA80Z Series
Welwyn Components
•
•
•
•
•
•
All welded construction
Suitable for automatic pick and place
Excellent pulse handling capability
Fuses safely under fault conditions
Competitive cost
Performance equivalent to 2, 3 & 5W
axial resistors
Electrical Data
WA83Z
Power rating at 25˚C
Resistance range
Limiting element voltage
Isolation voltage
TCR
Resistance tolerance
Standard values
Ambient temperature range
°C
watts
ohms
volts
volts
ppm/°C
%
2
0R05 to 900R
50
250
<20R: 5, 10
WA84Z
3
0R01 to 2K2
100
350
≤1R0:350
>1R0:200
≥20R:
1, 2, 5, 10
E24 series preferred
-55 to 155
WA85Z
5
0R015 to 6K8
150
500
Physical Data
Dimensions (mm)
Type
WA83Z
WA84Z
WA85Z
L
13.4±0.2
18.7±0.2
18.7±0.2
W
3.6 max
5.2 max
7.0 max
H
6.25 max
6.9 max
7.9 max
l
9.0 max
14.5 max
16.5 max
w
4.5±0.6
6.5±0.6
6.5±0.6
d
0.8 nom
0.8 nom
0.8 nom
d
w
H
L
I
W
Recommended Pad Sizes
Dimensions (mm)
Type
WA83Z
WA84Z
WA85Z
A
5.5
7.5 min
7.5 min
B
2.5 min
2.5 min
2.5 min
C
10 max
15 max
15 max
D
15 min
20 min
20 min
B
A
C
D
Construction
A high purity ceramic substrate is assembled with interference
fit end caps to which are welded the terminations. The
resistive element is wound on the substrate and welded to
the caps. Flameproof silicone cement coating is applied
prior to marking with indelible ink and lead forming.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
Issue G · 03.06
© 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
WELWYN [ WELWYN COMPONENTS LIMITED ]
