Shanghai CII Electronics Co., Ltd., founded in 1999 in Shanghai’s Baoshan District, is a privately owned clean energy manufacturer with 1,000+ employees and 120+ R&D professionals.
With a 2025 turnover of €170M, the company leads China’s EV component market: #1 in EMI filters, #2 in BDUs, and #2 in DC contactors.
Core products include EMI filters, high-voltage DC contactors (epoxy/ceramic, 30–1,000 A, up to 1,800 VDC), and BDU/PDU units for EVs, energy storage, charging infrastructure, and industrial equipment.
Key customers include SAIC, Geely, BYD, Volkswagen, Volvo, Mercedes-Benz, Stellantis, Bosch, Magna, and CATL.
Certified to IATF 16949, ISO 9001, ISO 14001, ISO 45001, ISO 27001, with a CNAS-accredited testing lab and production in Shanghai, Chuzhou, Vietnam, and Hungary (ramp-up).