About SISE

Dongguan SISE (Spring-in-Spring) Electronics Co., Ltd. is a precision spring-contact and canted-coil-connector manufacturer founded in 2011 and based in Chang'an, Dongguan, China. Our 1,000 m² facility houses machining, spring, assembly and inspection workshops.

Dongguan SISE (Spring-in-Spring / 簧中簧) Electronics Co., Ltd. was founded in 2011 and is a specialist company integrating R&D, manufacturing and sales of high-end spring contacts, high-current connector terminals and EMI/RFI shielding solutions. Since its establishment the company has held 2 invention patents and a number of utility-model patents, and it has consistently built on product quality, starting from the details and following a high-standard development path. The company's products are widely used in medical, telecom, electric vehicle, aerospace and high-speed-rail industries. Main products include the spring contact finger series, spring-in-spring socket structures, torsion spring structures, slotted socket structures, crown spring blade structures, rectangular blade structures, and various custom connector terminals and precision hardware parts. The company relocated to Chang'an Town, Dongguan in 2018 and operates machining, spring, assembly and laboratory workshops over a 1,000 m² facility. The company operates 16 CNC lathes, 7 Swiss-type CNC lathes, 6 CNC 4-axis machining centers, 2 mill-turn composite machines, 6 spring CNC machines and 6 laser welders, plus a range of secondary processing equipment. This ensures high product quality and standards while protecting order lead times, helping customers capture greater market value.