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B57871S0103F001 参数 Datasheet PDF下载

B57871S0103F001图片预览
型号: B57871S0103F001
PDF下载: 下载PDF文件 查看货源
内容描述: NTC热敏电阻温度测量 [NTC thermistors for temperature measurement]
分类和应用:
文件页数/大小: 19 页 / 334 K
品牌: EPCOS [ EPCOS ]
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Temperature measurement  
B57871S  
S871  
Leaded NTC thermistors, lead spacing 2.5 mm  
Mounting instructions  
1
Soldering  
1.1  
Leaded NTC thermistors  
Leaded thermistors comply with the solderability requirements specified by CECC.  
When soldering, care must be taken that the NTC thermistors are not damaged by excessive  
heat. The following maximum temperatures, maximum time spans and minimum distances have  
to be observed:  
Dip soldering  
max. 260 °C  
max. 4 s  
Iron soldering  
max. 360 °C  
max. 2 s  
Bath temperature  
Soldering time  
Distance from thermistor  
min. 6 mm  
min. 6 mm  
Under more severe soldering conditions the resistance may change.  
1.2 Leadless NTC thermistors  
In case of NTC thermistors without leads, soldering is restricted to devices which are provided  
with a solderable metallization. The temperature shock caused by the application of hot solder  
may produce fine cracks in the ceramic, resulting in changes in resistance.  
To prevent leaching of the metallization, solder with silver additives or with a low tin content  
should be used. In addition, soldering methods should be employed which permit short soldering  
times.  
2
Clamp contacting  
Pressure contacting by means of clamps is particularly suitable for applications involving frequent  
switching and high turn-on powers.  
3
Robustness of terminations (leaded types)  
The leads meet the requirements of IEC 60068-2-21. They may not be bent closer than 4 mm  
from the solder joint on the thermistor body or from the point at which they leave the feed-  
throughs. During bending, any mechanical stress at the outlet of the leads must be removed. The  
bending radius should be at least 0.75 mm.  
Tensile strength: Test Ua1:  
Leads  
0.25 mm = 1.0 N  
0.35 mm = 2.5 N  
0.50 mm = 5.0 N  
0.80 mm = 10.0 N  
1.25 mm = 20.0 N  
0.25 <  
0.35 <  
0.50 <  
0.80 <  
Please read Cautions and warnings and  
Important notes at the end of this document.  
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