The TMS15H48S12 from Calex Manufacturing is a DC to DC Converter with Input Voltage 18 to 75 V, Output Voltage 1 12 V, Output Current 1 1250 mA, Output Power 15 W, Isolation Voltage 1.5 kV. Tags: Through Hole, Buck/Step down. More details for TMS15H48S12 can be seen below.