The DC-DC Converter provides clean 48VDC power for vehicle electronics, instrumentation, radios and other control equipment. For operation under the most harsh and demanding conditions, the unit is sealed and enclosed to protect against moisture, shock and vibration. Power from a battery or other source in the range of 9-36Vdc (12V or 24V nominal) is converted to a 48Vdc output regulated to 1% and 3 Amps continuous current. Input and output isolation is provided. The unit is designed with extremely rugged surge and transient suppression in addition to sustained over/under voltage protection. With a nameplate rating of 144 W of output power, the DC-DC Converter has an efficiency rated at >92% (for 12Vdc input) or 93% (for 24Vdc input).