The THI 1221 from Traco Power is a DC to DC Converter with Input Voltage 10.8 to 13.2 V, Output Voltage 1 12 V, Output Current 1 0.083 A, Output Power 2 W, Output Voltage 2 -12 V. Tags: Through Hole, Buck-Boost. More details for THI 1221 can be seen below.