Our company, Shanghai Sunon Telecommunication Protection Equipment Co.,Ltd, was founded in 1997 by Shanghai Wayon Thermo-Electro Materials Co., Shanghai Research Institution of Materials and several corporations.

Sunon, focusing on leading edge technology, mainly develops, manufactures and sells circuit protection devices. As one of just few companies in the world who possess the core technology of PPTC, Sunon is the first and largest scale domestic manufacturer of Polymer PTC thermistor ( PTC resettable fuse) , pioneering the use of PPTC device as variable resistor in circuit protection in China.

Back by its experience, innovation, customized and secure solution to circuit protection, Sunon has become the leading supplier of PPTC device in China which serves a broad range of market including: Telecommunication, Automobile, Battery, IT, Computer, electronic, automatic equipment.