The SQ48S04120-PS00G from Bel Fuse is a DC to DC Converter with Input Voltage 36 to 75 V, Output Voltage 1 12 V, Output Current 1 4000 mA, Output Power 48000 mW, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount, Buck/Step down. More details for SQ48S04120-PS00G can be seen below.