Astron Non-Isolated Step-Down DC to DC Converters are ideal for use with mobile 12/13.8 VDC equipment. The N2412-40 input voltage range is 22-56 Vin Wide Range 13.8 Volts DC out @40 Amps Peak. Features include LED indicator, over voltage and short circuit protection, input-side over voltage/transient protection, and input-side reverse polarity protection. Includes a separate Remote On/Off connection terminal for use with an ignition switch. Great for use in industrial equipment, trucks, tractors, buses, marine applications, mobile radio and 24 volt aircraft systems.