Matson industry co., ltd. This capacitor takes heavy-edge metalized al/zn pp film as dielectric, coiled by high speed winding machine, liquid filled aluminum case and protective device structure with^ it is treated by using refined castor oil or wax as an impregnant in the high temperature and vacuum environment to make the capacitor more stable with long working life. Meanwhile based on the principle of safety and proof-explosion, this kind of capacitors has been used the second age mechanical explosion prevent design to strengthen the reliability. The product adopts single and combined structures.