The MCW03-12S12 from Total Power International is a DC to DC Converter with Input Voltage 9 to 18 V, Output Voltage 1 12 V, Output Current 1 63 to 250 mA, Output Power 3000 mW, Operating Temperature -40 to 85 Degree C. Tags: Through Hole, Buck-Boost. More details for MCW03-12S12 can be seen below.