VXO78-500-M Non-Isolated DC-DC Converters CUI Inc VXO78-500-M Non-Isolated DC-DC Converters feature an ultra-thin SMT package with a thickness of ≤3.5mm and an open-frame design. The VXO78-500-M series offers output short-circuit protection, high efficiency of up to 95%, and no-load input current as low as 0.2mA. CUI Inc VXO78-500-M Non-Isolated DC-DC Converters are IEC/EN 62368-1 certified and operate in a wide -40°C to +85°C temperature range.