Nantong Jianghai Capacitor Co., Ltd. was established in 1959 and began producing aluminum electrolytic capacitors in 1970. Today, Jianghai is China’s largest manufacturer of electrolytic, film, and ultracapacitors, ranking among the top 10 worldwide.

With more than 1,000 employees across its parent company and five joint-venture subsidiaries, Jianghai produces 2.3 billion capacitors annually, including SMD, radial, snap-in, lug, and screw-type designs.

Jianghai is known for its continued investment in advanced manufacturing technology, with production, testing, and measurement equipment sourced primarily from Japan. Long-standing partnerships with leading Japanese manufacturers support technology sharing, process optimization, and consistently high product quality. Vertically integrated facilities further enable cost efficiency and supply stability.

Innovation is a core focus at Jianghai. The company operates a dedicated Research & Development Institute and collaborates closely with China’s Aluminium Electrolytic Technology Research Centre. Jianghai has participated in numerous national technology initiatives and was among the first capacitor manufacturers to transition fully to lead-free production.

Jianghai America, Inc. was established in 2000 to provide North American customers with direct access to Jianghai’s technical expertise. With a Los Angeles–based warehouse, U.S. sales engineers, and a strong distribution and engineering network, Jianghai America delivers responsive service and reliable technical support across the region.