鈥?/div>
Small size for power rating
Enhanced pulse handling capability
Flameproof protection
SMD Z-form available
RoHS compliant with Pb-free terminations
Electrical Data
WP1S
Power rating at 25擄C
5s overload rating at 25潞C
Short pulse performance
Resistance range
Limiting element voltage
TCR
Isolation Voltage
Resistance Tolerance
Standard Values
Thermal Impedance
Ambient temperature range
擄C/watt
擄C
140
110
90
ohms
volts
ppm/擄C
volts
%
250
<20R: 5
鈮?0R:
1, 2, 5
E24 preferred
82
-55 to +155
62
54
35
R068 to 430R
50
R05 to 900R
50
watts
watts
1
5
WP2S
2
10
WP25S
2.5
12.5
WP3S
3
15
WP4S
4
20
WP5S
5
25
WP7S
7
35
See Pulse Performance graphs
R05 to 900R R01 to 2K2
75
<1R: 350
350
100
鈮?R:
200
500
<R10: 5
鈮10:
1, 2, 5
<20R: 5
700
鈮?0R:
1, 2, 5
R01 to 10K
100
R015 to 6K8 R15 to 10K
150
150
Physical Data
Dimensions (mm) & Weight (g)
Type
L max
D max
f min
d nom
PCB
mount
centres
10.20
12.70
18.40
20.30
0.8
18.90
22.86
31.40
1.2
Min
bend
radius
0.6
Wt.
nom
0.22
0.50
0.50
1.10
1.00
1.75
4.40
D
WP1S
WP2S
WP25S
WP3S
WP4S
WP5S
WP7S
6.2
9.0
12.5
14.5
13
16.5
25.0
2.8
3.6
4.5
5.2
5.6
7.0
8.8
21.20
19.80
17.80
24.55
22.75
23.55
28.30
0.6
d
L
f
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. The components are then leadformed if required and packed.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn鈥檚 own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
Issue E 路 07.06
漏 Welwyn Components Limited
路 Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 路 Facsimile: +44 (0) 1670 829465 路 Email: info@welwyn-tt.com 路 Website: www.welwyn-tt.com
WELWYN
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