The TRN 3-1212SM from Traco Power is a DC to DC Converter with Input Voltage 9 to 18 V, Output Voltage 1 12 V, Output Current 1 0.25 A, Output Power 3 W, Isolation Voltage 1.6 kV. Tags: Surface Mount, Buck-Boost. More details for TRN 3-1212SM can be seen below.