The MCW03-12S05 from Total Power International is a DC to DC Converter with Input Voltage 9 to 18 V, Output Voltage 1 5 V, Output Current 1 150 to 600 mA, Output Power 3000 mW, Operating Temperature -40 to 85 Degree C. Tags: Through Hole, Buck/Step down. More details for MCW03-12S05 can be seen below.