The MIL-COTS Bus Converter Module (BCM) is a high efficiency, fixed ratio module operating from a 270V input voltage and delivering an isolated 28V or 48V nominal output voltage. The low weight, high efficiency and high power density enable SWaP-C requirements. Its wide input range helps achieve MIL-STD-704 E/F without external clamping. Low noise, high-frequency operation minimizes filter size needed for MIL-STD compliance and it can be paralleled to create multi-kW arrays.