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Detailed introduction of film capacitors(I)

Views:0     Author:Site Editor     Publish Time: 2018-05-12      Origin:Site

Film capacitors is a capacitor with a metal foil as an electrode, and its plastic films, such as poly (ethylene glycol), polypropylene, polyvinyl or polycarbonate, are reduplicated from both ends and rolled into a cylindrical structure. The types of plastic films are called poly (ethylene glycol) capacitors (also called Mylar capacitors), polypropylene capacitors (also called PP capacitors), polystyrene capacitors (also called PS capacitors) and polycarbonate capacitors.


Film capacitors is an excellent capacitor because of its many excellent characteristics. Its main properties are as follows: Zero polarity, high insulation impedance, excellent frequency response (wide frequency response), and small dielectric loss. Based on the above advantages, film capacitors is widely used in analog circuits. Especially in the part of the signal connection, it is necessary to use a capacitor with very good frequency characteristics and very low loss of medium, to ensure that the signal does not have too much distortion when the signal is transmitted. In all film capacitors, the properties of polypropylene (PP) capacitor and polystyrene (PS) capacitor are most obvious, and of course the two kinds of capacitors are also more expensive. However, in recent years, in order to improve the quality of sound, the materials used in the sound equipment have become more and more advanced, and the price is not the most important factor. So in recent years, the frequency and quantity of the PP capacitor and PS capacitance used in the sound equipment have also become more and more high.


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