Classification of film capacitors

Terminal method:

Film capacitors can be divided into DC film capacitors and AC film capacitors: DC film capacitor refers to a film capacitor working in a circuit powered by a DC power supply, which is divided into general categories, power supply electromagnetic interference suppression, pulse categories and precision categories; AC film capacitor refers to a film capacitor working in a circuit powered by an AC power supply, which is divided into motor start-up operation and power factor compensation according to function.

Film capacitor advantages:

Film capacitors have many excellent characteristics and are excellent capacitors. Its main equivalences are as follows: no polarity, high insulation resistance, excellent frequency characteristics (wide frequency response), and low dielectric loss. Because of the above advantages, film capacitors are widely used in analog circuits. For the signal interconnection part, capacitors with good frequency characteristics and extremely low dielectric loss must be used to ensure that the signal is not distorted too much when it is transmitted. In all plastic film capacitors, polypropylene (PP) capacitors and The characteristics of polystyrene (PS) capacitors are the most obvious, and the prices of these two capacitors are relatively high. In recent years, in order to improve the sound quality of audio equipment, the quality of parts materials used is high, and the price is not the most important consideration. Therefore, the frequency and number of PP capacitors and PS capacitors used in audio equipment are getting higher and higher.