The TMS15H48S5R1 from Calex Manufacturing is a DC to DC Converter with Input Voltage 18 to 75 V, Output Voltage 1 5.1 V, Output Current 1 3000 mA, Output Power 15 W, Isolation Voltage 1.5 kV. Tags: Through Hole, Buck/Step down. More details for TMS15H48S5R1 can be seen below.