Major manufacturer of waterproof connectors in China

1; AVIC Optoelectronics (JONHON)‌: Military background, IP68 high-reliability waterproof connector, leading aerospace, rail transit, high-end equipment, domestic high-end representative.
‌2;WEYER‌: a national-level "specialized, special and innovative" enterprise, focusing on cable waterproof joints, IP68/IP69K protection, supporting CATL, BYD, and CRRC, with a leading domestic market share.
‌3;Sunway Communication‌: Shenzhen company, RF and precision waterproof connectors (such as waterproof Micro USB, TYPE-C), covering 5G, smart wearables, and vehicles, with mature IP68 solutions.
4‌; Kingsignal‌: Shenzhen leader, focusing on high-protection signal interconnection. Its products are used in 5G base stations, shipboard, and new energy. It has laser welding sealing and salt spray corrosion resistance technology.
5‌;Voter‌: Shenzhen company, good at miniaturized waterproof connectors (TYPE-C, HDMI, etc.), IP65–IP68, serving smartphones, Vehicle and industrial control.

‌6; Chuangyitong‌: Shenzhen Guangming Base, precision waterproof connectors for consumer electronics and vehicles, laser welding + metal injection sealing, IP68 rating.

7; JNJDZ: Shenzhen factory, focusing on the production of high-end waterproof connectors for LED lamps, agricultural machinery, and mining equipment. It has strong customization capabilities and is recognized by European and American companies such as Osram. It is one of the very few manufacturers that can provide IP69K waterproof rating.

Note: Some international brands (such as TE Connectivity, ABB) have factories in China, but they are foreign-owned; the above list focuses on domestic-led, locally manufactured companies with independent technology and large-scale production capacity. ‌‌

When selecting, a comprehensive judgment should be made based on the protection level (IP65–IP69K), current/signal type (power/data/RF), industry certification (UL/CQC/CE) and application scenarios (outdoor, industrial, vehicle-mounted, energy storage).