The Working Principles and Functions of Film Capacitors

Aug. 04, 2021

Film capacitors are a common type of capacitors that can be seen everywhere in the electronics market. In this article let’s discuss the working principles and functions of film capacitors, which should be very helpful to us.

The working principle of film capacitors:

The working principle of film capacitors is the same as that of general capacitors. They store electric energy by storing charges on the electrodes. Capacitors work on the principle that charges will be forced to move in an electric field. When there is a medium between conductors, the charge movement is blocked and the charge accumulates on the conductors, resulting in the accumulation and storage of charge.

The role of film capacitors:

①The function of the film capacitor is the same as that of all capacitors, which is to hold the charge.

② Compared with other general capacitors, the film capacitor has many excellent characteristics, so it is a capacitor with superior performance. Its main characteristics are as follows: non-polarity, high insulation resistance, excellent frequency characteristics (wide frequency response), and low dielectric loss.

③Metallized film capacitors have a so-called self-recovery effect. It is assumed that when the tiny part of the electrode is short-circuited due to the fragile dielectric, the electrode metal around the short-circuited part will cause a larger area to melt and evaporate to restore the insulation, so that the capacitor will be restored again. In other words, it can heal itself instantly.

The Working Principles and Functions of Film Capacitors

The above content is about the working principles and functions of film capacitors. It is advisable to choose a reliable manufacturer to purchase quality film capacitors. Good film capacitor manufacturers can reduce many unnecessary problems. Dongguan Zhixu Electronics Co., Ltd (also JYH HSU(JEC)) manufactures and sells a full range of capacitor models with guaranteed quality. JEC has passed ISO9001:2015 quality management system certification. Our safety capacitors (X and Y series) and varistors have passed certifications of main industrial powers across the world and our ceramic capacitors and film capacitors are in line with environmental protection directives.

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