Dongguan Longkey Electronic Co., Ltd was established in 1985, in order to undertake the project "19885 Spark Plan" -realizing the localization and the industrialization of PTC (Positive Temperature Coefficient Resistance) material, which was organized by Guangdong Science Committee. As the earlier developer and professional manufacturer of PTC material, Longkey has been granted The Top Energy Conservation Company by the Light Industry in 1991. The company has award High-tech Enterprise in 1995. In 1998, the company has changed to shareholding system of private enterprise from town-established collective enterprise.

Longkey Company has been devoting itself to the development, production and marketing of high efficient and energy-con