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SPH

更新时间: 2024-02-27 08:05:21
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
2页 630K
描述
General-Purpose Failsafe Moulded Wirewound Resistors

SPH 数据手册

 浏览型号SPH的Datasheet PDF文件第2页 
General-Purpose Failsafe  
Moulded Wirewound Resistors  
Welwyn Components  
SPH/SPF Series  
Drop-in replacement for BWH/BWF  
2 watt rated with 1 watt dimensions  
±±5% ±1ꢀ5 tolerance  
ꢀ.1 ohm to 24ꢀꢀ ohms  
TCR’s as low as ±1±ꢀ ppm/°C standard  
(custom TC’s available)  
Weldable and solderable leads  
Electrical Data  
Type  
SPH  
SPF  
EIA RS-344 Style  
MIL-R-11 Style  
Resistance  
CRU2  
RC32/RC42  
0R1 to 1k  
ohms  
%
0R1 to 2k4  
Tolerance  
5, 10  
Power rating  
watts  
2 at 70°C  
1 at 115°C  
Derating to 0 at 160°C  
Maximum continuous working voltage  
Minimum insulation resistance  
PR  
10,000 Meg  
100 Meg  
dry  
wet  
Minimum dielectric withstanding volts  
Reduced pressure  
ATM  
RMS  
watts  
1000V  
625V  
Hotspot temperature rise  
Current noise  
145°C at 2 watts  
Negligible  
Physical Data  
Dimensions (mm)  
Type  
SPH  
SPF  
L
D
d
f
d
14.3 0.25  
14.3 0.25  
5.72 0.20 0.813 0.05  
5.72 0.20 0.813 0.05  
38.1 3.2  
38.1 3.2  
D
L
f
Resistive Element  
Encapsulation  
All resistor types have resistance alloy winding on a braided  
fibreglass substrate. Intermediate silicone coatings are used to  
enhance processibility and to provide protection to the  
resistive element.  
The SPH and SPF are encapsulated utilizing a compression  
moulded phenolic plastic material. The SPF has a flame-  
resistance coating applied over the resistive element to provide  
flammmability protection when destructive overloads may occur.  
Termination  
Marking  
The SPH and SPF resistors are terminated using an alloy  
coated copper flashed steel lead welded to a cap of the same  
material. This termination assembly is mechanically crimped,  
utilizing an improved crimp design, to the resistive element.  
All products are marked utilizing heat and solvent resistant  
colour code bands consistent with EIA/MIL requirements. The  
first band is double width to designate wirewound construction.  
A fifth band, blue in colour, is used for flameproof identification.  
General Note  
Welwyn Components reserves the right to make changes in product specification without notice or liability.  
All information is subject to Welwyns own data and is considered accurate at time of going to print.  
A subsidiary of  
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 B · 03.02  
93  

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