长虹电子有限公司创立于1984年，并于上海投资成立上海江宏电子有限公司，专业生产肖特基二极管、开关二极管、齐纳二极管、瞬态电压抑制二极管、标准/快速/超快/特快恢复二极管、桥式整流器等功率半导体组件，SEP为本公司自有品牌。提供客户全方位的服务，运用最俱竞争力的价格与先进的技术支持，提供高品质的产品，帮助客户有效节省成本、提高效能。
SEP ELECTRONIC CORP. was established as one of reliable suppliers since 1984. Our mission is to offer the customers with superior quality, reliability and competitive cost in vast range selection of rectifiers, from standard to fast, super fast recovery, bridge assemblies, plastic encapsulated, as well as to produce surface mount, schottky and high voltage rectifiers.