PYBJ3 3W DC-DC Converters CUI Inc PYBJ3 3W DC-DC Converters feature high efficiency of up to 82%, 3W isolated output, and an ultra-wide input voltage range of 4.5VDC to 9VDC or 9VDC to 36VDC. These single-output devices offer 1500VDC isolation and output short-circuit, overcurrent, overvoltage protection. CUI Inc PYBJ3 3W DC-DC Converters are EN 62368 approved and available with or without a case.