Electric heat capacitor is mainly used in the medium-frequency induction heating electric system, for raising power factor and improving circuit property. Electric heat capacitor is composed of core and trunk cover, between which is filled with high quality infiltration. The core is welded with cooling water pipes, which are used for cooling capacitor. Its performances are in compliance with the GB/T3984.1-2004/IEC60110-11998 power capacitor for induction heating apparatus.