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Film Capacitors

Film capacitors, also known as film dielectric capacitors, are capacitors with a dielectric made of a plastic film material such as polyester, PEN, or polypropylene, with electrodes on both sides of the film. Compared with traditional paper capacitors, film capacitors have excellent features such as low dielectric losses, good temperature stability, high insulation resistance, good self-healing ability, high volumetric efficiency, and long life. They are widely used in various electronic applications including AC filters, snubber capacitors, and power factor correction.

MKP385251085JC02G0 application field and working principle

MKP385251085JC02G0 is a metalized polypropylene film capacitor designed for AC applications. It has excellent electrical properties such as high dv/dt, low dielectric losses, low ESR, high temperature stability, and high insulation resistance. It is available with voltage ratings from 100V to 1KV and nominal capacitances of 1 to 6.8µF. It is designed for use in applications such as motor starters, fluorescent lights, and electrical appliances.

The working principle of the MKP385251085JC02G0 is based on the storage of electrical charge on the metalized film dielectric. When an alternating voltage is applied across the film dielectric, a leakage current is generated due to the presence of charge carriers. As the applied voltage is increased, more charge carriers are generated, resulting in a rise in the insulation resistance and a decrease in the impedance of the capacitor. This is how the MKP385251085JC02G0 is able to act as an AC filter.

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