Why do film capacitors burst during use?

2019-04-17 16:27

Film capacitors are widely used in electronics, home appliances, communications, power and other fields due to their non-polarity, high insulation resistance, excellent frequency characteristics, low dielectric loss, and strong surge resistance.

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But many people have the problem of bursting after buying film capacitors. What's going on? Let's take a look at the reasons why film capacitors burst.

Reasons for film capacitors to burst:

1. Improper selection of film capacitors

There are many types and models of film capacitors. When purchasing, be sure to figure out where and what role the film capacitors you choose are used for. For example, CBB21S film capacitors should be used in TV sets, but CBB21 film capacitors are used, and the rated voltage and capacitance are different for a long time, and it is easy to burst.

2. The working temperature of the film capacitor is too high

The working temperature range of film capacitors is 40~110°C, and film capacitors are prone to burst when working for a long time at temperatures exceeding 110°C.

3. The working voltage of the film capacitor exceeds the rated voltage

When using film capacitors, in addition to the type problem, it also depends on the working voltage and rated voltage. The rated voltage of the purchased film capacitor is 250V, but the working voltage is above 275V, and the film capacitor will also burst when working at this voltage.

4. Use inferior film capacitors

I am not familiar with film capacitors when purchasing film capacitors. It is easy to buy inferior film capacitors. The voltage of inferior film capacitors is unstable and it is easy to burst.

After reading the above content, you must understand why the film capacitor burst. At the same time, the editor also reminds that if you are a novice and do not know how to buy film capacitors, finding a regular film capacitor manufacturer can help you solve the problem and avoid stepping on thunder.

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