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WP7S-680RFA1

更新时间： 2024-11-11 03:37:11
品牌 Logo 应用领域
TTELEC 电阻器线绕电阻器
页数 文件大小 规格书
4页 451K
描述
Compact Flameproof Power Wirewound Resistors

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WP7S-680RFA1 数据手册

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Compact Flameproof Power  
Wirewound Resistors  
Welwyn Components  
WP-S Series  
• Small size for power rating  
• Enhanced pulse handling capability  
• Flameproof protection  
• SMD Z-form available  
• RoHS compliant with Pb-free terminations  
Electrical Data  
WP1S  
WP2S  
2
WP25S  
2.5  
WP3S  
3
WP4S  
4
WP5S  
5
WP7S  
7
Power rating at 25°C  
5s overload rating at 25ºC  
Short pulse performance  
Resistance range  
watts  
watts  
1
5
10  
12.5  
15  
20  
25  
35  
See Pulse Performance graphs  
R068 to 430R R05 to 900R R05 to 900R R01 to 2K2  
ohms  
volts  
R01 to 10K R015 to 6K8 R15 to 10K  
Limiting element voltage  
TCR  
50  
50  
75  
100  
100  
150  
150  
ppm/°C  
volts  
<1R: 350  
≥1R: 200  
Isolation Voltage  
250  
350  
500  
700  
Resistance Tolerance  
%
<R10: 5  
≥R10: 1, 2, 5  
<20R: 5 ≥20R: 1, 2, 5  
<20R: 5 ≥20R: 1, 2, 5  
Standard Values  
E24 preferred  
82  
Thermal Impedance  
°C/watt  
°C  
140  
110  
90  
62  
54  
35  
Ambient temperature range  
-55 to +155  
Physical Data  
Dimensions (mm) & Weight (g)  
Type  
L max  
D max  
f min  
d nom  
0.6  
PCB  
mount  
centres  
Min  
bend  
radius  
Wt.  
nom  
D
WP1S  
WP2S  
WP25S  
WP3S  
WP4S  
WP5S  
WP7S  
6.2  
9.0  
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  
10.20  
12.70  
18.40  
20.30  
18.90  
22.86  
31.40  
0.6  
0.22  
0.50  
0.50  
1.10  
1.00  
1.75  
4.40  
12.5  
14.5  
13  
0.8  
1.2  
L
f
d
16.5  
25.0  
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.  
A subsidiary of  
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.  
TT electronics plc  
© 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 · 07.06  
1234

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