Failure Status of Metallized Film Capacitor

Sep. 10, 2021

Metallized film capacitors are capacitors that use plastic film as the dielectric, metalized films as the electrodes, and made by winding the materials together (except for laminated structure). The films used in metalized film capacitors are polyethylene, polypropylene, polycarbonate, etc. In addition to the winding type, there are also laminated types. Among them, polyester film media and polypropylene film media are widely used. How does the metal film capacitor look like after it fails? Read this article to find out.


Characteristics of failed metallized film capacitors:

The initial failure of the metalized film capacitor is manifested as a decrease in capacitance, an increase in loss value or an increase in equivalent series resistance (ESR); after a serious failure, the capacitance drops to zero and the capacitor becomes an open circuit state. Generally, the failure of the metalized film capacitor will not expand the fault range or cause damage to other devices.


To avoid open circuit faults, you can do this:

①Check the quality of electronic devices before use;

②Choose the correct metalized film capacitor according to the actual use environment;

③Pay attention to the quality of metalized film capacitors;

④Choose a reliable manufacturer;


Failure Status of Metallized Film Capacitor


The above content is about the failure of metallized film capacitors and the matters we need to pay attention to before using. Hopefully it's helpful to everyone. 

Metallized film capacitors have excellent electrical characteristics, high stability and long use time, and can meet the needs of a variety of different applications. The prospects of film capacitors are obvious. 

When choosing film capacitors, don't forget to find a reliable manufacturer. Dongguan Zhixu Electronic Co., Ltd. (also JYH HSU(JEC)) has a full range of capacitor and varistor models with guaranteed quality. JEC’s safety capacitors have passed ISO9001:2015 quality management system certification; JEC safety capacitors (X capacitors and Y capacitors) and varistors have passed certifications of main industrial countries across the world; JEC ceramic capacitors and film capacitors are in line with environmental protection indicators.


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