The TDN 3-1219WI from Traco Power is a DC to DC Converter with Input Voltage 4.5 to 18 V, Output Voltage 1 9 V, Output Current 1 0.333 A, Output Power 3 W, Isolation Voltage 1.6 kV. Tags: Through Hole, Buck-Boost. More details for TDN 3-1219WI can be seen below.