DC capacitor support, also called the DC Link capacitor. Support dc capacitor, belongs to a kind of passive components. Dc capacitor support, is now mainly adopts the polypropylene film dielectric support dc capacitor, it has great resistance to high voltage, current, low impedance, low inductance, capacity, low loss, small leakage current, temperature performance is good, fast charging and discharging, long service life (100000 hours), safety explosion-proof good stability, nonpolar convenient installation. They are widely used in power electronics industry.