Astron Corporation Step-Down DC/DC Converters offer high-efficiency DC conversion. These down-converters change an input voltage of 30-56 Volt DC to a highly regulated output voltage of 13.8 Volts DC. These converters provide no isolation between their input and output negative terminals and are meant for use in negative-ground systems. (I.E. Vehicles) Features include overvoltage and short-circuit protection, input-side overvoltage/transient protection, and input-side reverse polarity protection. Some possible applications include industrial equipment, heavy trucks, buses, marine vehicles, mobile radio equipment, and conversion from 24 volt aircraft systems. If you have a need to convert your high-voltage DC to 13.8 volts, these Astron Corporation Step-Down DC/DC Converters are designed to handle all of your most demanding applications!