The 0RSB-40U120 from Bel Fuse is a DC to DC Converter with Input Voltage 18 to 75 V, Output Voltage 1 5 V, Output Current 1 3500 mA, Output Power 42000 mW, Operating Temperature -40 to 85 Degree C. Tags: Through Hole, Buck/Step down. More details for 0RSB-40U120 can be seen below.