Samlex 12A Non-Isolated Step-Down 24VDC-12VDC Converter - Heavy Duty Applications [SDC-15]12A Non Isolated Step Down 24VDC 12VDC Converter Heavy Duty Applications This high efficiency switch mode step down DC DC converter converts an input voltage of 24 VDC nominal (range 20 VDC to 35 VDC) to a highly regulated output voltage of 12 VDC nominal (13. 8 VDC) at 12 Amps. The SDC 15 DC DC converter is non isolated (no galvanic isolation between input and output) and meant for use in negative ground systems. Features include overvoltage short