1 , the working voltage of the capacitor should be lower than the rated voltage , load an AC voltage if the voltage on a DC , then both should be less than the sum of the peak voltage of the capacitor selection Select rating, for use both AC voltage and pulse voltage circuit , their peak voltage of the capacitor and also should be less than the rated voltage.
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2 , even when the supply voltage is lower than the rated voltage, if the high-frequency AC voltage or pulse voltage circuits rapid rise time is used , then the performance of the capacitor will therefore be weakened.
3 , when the capacitors are mounted on the PC board , the amount of solder used ( size of the pad ) will directly affect the performance of the capacitor , and therefore must be considered in the design of the pad to the following points , the amount of solder size affect the chip 's ability to withstand mechanical stresses , which may lead to breaking or cracking , in the design of a substrate , must carefully consider the size and configuration of the pad , the amount of the composition of the solder substrate has a decisive role .
4 , if not this one element is continuously welded on the same substrate or pad , the pad should be designed so that the welding point of each element can be separated away from the solder .
5 , after the capacitors are mounted on the board , the chip will withstand the mechanical stresses generated in the next machining process ( eg PCBR cutting board inspection, the installation of other components , assembled in the end plate , wave soldering reflow board, etc. ) , and for this the reason , in the location and design of the pad SMD capacitors , consideration should be given to minimize the stress point .
6 , when the capacitor is mounted on the PC board , can not let the capacitors to excessive pounding force should install the machine on a regular basis to repair and inspection.
7 , a number of sticking together will reduce the insulation of the capacitor, the capacitor different tack Sarkozy and shrinkage stress generated in the capacitor and lead to cracking, even too much or too little adhesive board Qi will affect the installation components.
http://www.oemie.com is a supplier for 7a176b , psr10c40ct and thousand of other types electronic components, obsolete and hard to find electronic component, go our web find what you need and get quote now.
2 , even when the supply voltage is lower than the rated voltage, if the high-frequency AC voltage or pulse voltage circuits rapid rise time is used , then the performance of the capacitor will therefore be weakened.
3 , when the capacitors are mounted on the PC board , the amount of solder used ( size of the pad ) will directly affect the performance of the capacitor , and therefore must be considered in the design of the pad to the following points , the amount of solder size affect the chip 's ability to withstand mechanical stresses , which may lead to breaking or cracking , in the design of a substrate , must carefully consider the size and configuration of the pad , the amount of the composition of the solder substrate has a decisive role .
4 , if not this one element is continuously welded on the same substrate or pad , the pad should be designed so that the welding point of each element can be separated away from the solder .
5 , after the capacitors are mounted on the board , the chip will withstand the mechanical stresses generated in the next machining process ( eg PCBR cutting board inspection, the installation of other components , assembled in the end plate , wave soldering reflow board, etc. ) , and for this the reason , in the location and design of the pad SMD capacitors , consideration should be given to minimize the stress point .
6 , when the capacitor is mounted on the PC board , can not let the capacitors to excessive pounding force should install the machine on a regular basis to repair and inspection.
7 , a number of sticking together will reduce the insulation of the capacitor, the capacitor different tack Sarkozy and shrinkage stress generated in the capacitor and lead to cracking, even too much or too little adhesive board Qi will affect the installation components.