COSEL CO., LTD. is a Japan-based company mainly engaged in the manufacture and sale of direct current (DC) stabilizing power supplies. The Company operates in three business divisions. The Unit Power Supply division offers single, multi and multi-slot type power supplies of PMC series, MMB series and MMC series, among others. The Onboard Power Supply division offers DC to DC converters and alternate current (AC) to DC converters, power modules and multi-slot type power supplies of MAX series and others. The Noise Filter division provides single-phase input, three-phase input and DC input type noise filters of NAC series, NAM series, TAH series, SNR series and others. As of May 20, 2014, the Company had seven subsidiaries.