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Why is the film capacitor better than the metal foil capacitor?

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Both film capacitors and metal foil capacitors are used in the market, but more are used in film capacitors. Why? According to the principle, the film capacitor generally does not have a short-circuit failure, and the metal foil capacitor often has a short-circuit failure phenomenon, so the film capacitor has an advantage. But film capacitors have several aspects that are worth paying attention to.

 

1. The ability to withstand large currents is not high. However, this problem has been proposed. The double-sided metallized film can be used as the electrode, and the thickness of the metallization layer can be enhanced. At the same time, the metal process of the section can be further improved to reduce the contact resistance and compensate for the power factor. The role. The film capacitor is sealed with a plastic case to control the uniformity of the scale, has excellent flame retardant performance, and has good self-healing there. The reliability is very high. The film capacitor is widely used in filtering, noise reduction and low pulse circuits. in.

 

2. Power factor power factor compensation is a very important application of film capacitors in power technology. Many devices on electricity that convert electrical energy into other forms of energy are called inductive, and other forms of energy that can be converted into electrical energy are called power supplies. The apparent power is only partially converted into useful power. The amount.

 

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