The ASQ28S03120-NS00 from Bel Fuse is a DC to DC Converter with Input Voltage 18 to 45 V, Output Voltage 1 12 V, Output Current 1 3000 mA, Output Power 36000 mW, Operating Temperature -55 to 85 Degree C. Tags: Surface Mount, Buck/Step down. More details for ASQ28S03120-NS00 can be seen below.