The DC-DC converters provide clean DC power suitable for 12 VDC solenoids, relays, and other electrical systems. For operation under the most harsh and demanding conditions, the IP67 rated units are fully sealed and potted in an enclosure to protect against moisture, shock, and vibration. Power from a battery or other source of 48 VDC nominal is converted to a 13.8 VDC output regulated to 1%. The units have a high current output capability of 15 A nominal (18 A peak). The devices manage heat dissipation and require no forced cooling systems. Short circuit and reverse polarity protection are provided. The compact units are designed with extremely rugged surge and transient suppression in addition to sustained over/under voltage protection. With a nameplate rating of 180 Watts of output power, the DC-DC converters feature proprietary dual-phase topology for a high efficiency of >93%.