According to the changes of domestic and foreign markets, Beijing Zhongdian Beiyuan Electronic Technology Co., Ltd. has developed series capacitors of high frequency, high voltage, high temperature, high current, low ESR, low ESL series capacitors, high precision capacitors, core fed through capacitors, etc. in the application field of power electronic transformation technology, in addition to retaining water level sensor, igniter, automobile tuner and railway signal capacitor PS power supply, GTO, IGBT buffer absorption, high current resonance, high-frequency inverter welding machine, metallurgical smelting, high-frequency inverter, harmonic filter, EMC, high-power traction and strong magnetic generator, laser pulse power supply, high-frequency communication base station power feed through filter, medical equipment and other industries, the quality level is leading in China, and the failure rate is ≤ 30fit.