Cosel Co., Ltd. manufactures and sells electrical components and EMI filters in Japan and internationally. The company operates through five segments: Sales Business, North American Sales Business, European Production and Sales Business, Asian Sales Business, and Chinese Production Business. It offers AC-DC power supplies and DC-DC converters; and three- and single-phase EMI filters and DC input EMI filters, as well as semiconductor devices, such as IC and FET products, transistors, diodes, etc. for use in industrial and consumer equipment. The company was formerly known as Elco Co., Ltd. and changed its name to Cosel Co., Ltd. in April 1992. Cosel Co., Ltd. was incorporated in 1969 and is headquartered in Toyama, Japan.