COSEL USA inc is the U.S. subsidiary of COSEL Co., Ltd. Japan, serving the U.S. market as the marketing, distribution and service organization of COSEL AC⁄DC, DC⁄DC Switching Power Supply products. COSEL, ISO 9001 and ISO 14001 approved manufacturer of Switching Power Supply, has been providing the users all over the world with high quality Switching Power Supply since 1969. COSEL product application has been diversified into many industries such as office and factory automation, telecommunications, data and image processing, medical and aerospace, etc, wherever the performance and reliability is critical.


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COSEL U.S.A. is one of the world's leading power supply manufacturers offering high-quality, ultra small size AC-DC power supplies, DC-DC converters of the state-of-the-art technologies, and effective and easy-to-use noise filters.

COSEL U.S.A Website

Technical Information

Please click the links below to view technical information about COSEL's products.

Technical Data