The THN 20-4810 from Traco Power is a DC to DC Converter with Input Voltage 36 to 75 V, Output Voltage 1 3.3 V, Output Current 1 4.5 A, Output Power 20 W, Isolation Voltage 1.5 kV. Tags: Through Hole, Buck/Step down. More details for THN 20-4810 can be seen below.