The TDR 3-1222SM from Traco Power is a DC to DC Converter with Input Voltage 9 to 18 V, Output Voltage 1 12 V, Output Current 1 0.125 A, Output Power 3 W, Output Voltage 2 -12 V. Tags: Surface Mount, Buck-Boost. More details for TDR 3-1222SM can be seen below.