The TDR 2-4811SM from Traco Power is a DC to DC Converter with Input Voltage 36 to 75 V, Output Voltage 1 5 V, Output Current 1 0.4 A, Output Power 2 W, Isolation Voltage 1.6 kV. Tags: Surface Mount, Buck/Step down. More details for TDR 2-4811SM can be seen below.