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In order to increase the capacitance of the capacitor electrodes usually rolled into foil winding with dielectric film into core in order to minimize the volume, so formed the film capacitor, film capacitor is the most colorful capacitor in the family.Film capacitor can be divided into paper according to the different dielectric medium, organic media.High performance organic media is more and more widely used, however, paper media still has its application area.Organic medium can also be divided into polyethylene, polystyrene, polytetrafluoroethylene, polypropylene, polyester, polycarbonate, polyimide, polysulfone, PPS, film, etc., different medium has different electrical properties, can choose according to different application corresponding dielectric capacitor. Film capacitor can also according to different divided into foil electrode form and metallized capacitors, film capacitors, metallized capacitors can be smaller volume, inductive and non-inductive winding capacitor cent two kinds of winding.This wound as core is actually a strip coil, there are a lot of laps, foil electrodes respectively to stagger on either side of the paper, make the side of the foil belt out of paper tape, outside winding into cylindrical core Yin line after welding.It makes film capacitor can be used at higher frequencies.

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