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Precautions For Using Film Capacitors

Dongguan Weiqing Electronics Co.,Ltd | Updated: Feb 10, 2019
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i believe that film capacitors are familiar to everyone, because film capacitors can be used in all major industries. do you know what to pay attention to for the use of film capacitors?


first, the working voltage

the film capacitor is selected from the highest voltage applied by the rain, and is affected by factors such as applied voltage waveform, current waveform, frequency, ambient temperature, and capacitance. before use, please check whether the voltage waveform, current waveform and frequency of the two sections of the capacitor are within the rated value.

Product Picture 2


second, the working current

the pulse current through the capacitor is equal to the product of the rate of increase of the capacitance c rain voltage, that is, i=cxdv/dt. due to the loss of the capacitor, when used under high frequency or high pulse conditions, the pulse current through the capacitor will use the capacitor itself to generate heat. with a temperature rise, there is a danger of thermal breakdown. therefore, the safe use conditions of the capacitor are not only limited by the rated voltage or but also by the rated current. the operating current is considered to be composed of the pulse current and the continuous current determined by the breakdown mode. when used, it is necessary to confirm that the current is within the allowable range. for capacitors used under high frequency or high pulse conditions, we recommend polypropylene film capacitors.


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