The TDR 2-1211SM from Traco Power is a DC to DC Converter with Input Voltage 9 to 18 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 2-1211SM can be seen below.