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Metalized film capacitor is a metalized film capacitor formed by rolling or stacking double-sided metalized polypropylene film and non-metalized polypropylene film.
　　 characteristics, so it is an excellent performance capacitor. Its main characteristics are as follows: non-polarity, high insulation resistance, excellent frequency characteristics (wide frequency response), and low dielectric loss. Based on the above advantages, film capacitors are widely used in analog circuits. Especially in the signal cross-connection part, capacitors with good frequency characteristics and extremely low dielectric loss must be used to ensure that the signal will not be too distorted when it is transmitted. Among all the plastic film capacitors, polypropylene (PP) capacitors and polystyrene (PS) capacitors have the most remarkable characteristics. Of course, the prices of these two types of capacitors are relatively high. However, in recent years, in order to improve the sound quality of audio equipment, the parts and materials used have become more and more advanced. Price is not the most important consideration. Therefore, in recent years, the frequency and quantity of PP capacitors and PS capacitors used in audio equipment have also increased. Higher. Readers can often see XX brand equipment, how many XX brand name PP capacitors or PS capacitors are used as an endorsement of the sound quality. This is the reason.
　　 The usual Metalized Film Capacitor is made by overlapping metal foil such as aluminum as an electrode and a plastic film and then winding them together. However, there is another manufacturing method for film capacitors, called Metallized Film. The manufacturing method is to deposit a thin layer of metal on the plastic film by vacuum evaporation to serve as the electrode. In this way, the thickness of the electrode foil can be omitted, and the volume of the capacitor per unit capacity can be reduced, so the film capacitor is easier to be made into a small and large-capacity capacitor. For example, the common MKP capacitor is the name of the metalized polypropylene film capacitor (Metailized Polypropylene Film Capacitor), and the MKT is the name of the metalized Polypropylene Film Capacitor (Metailized Polyester).