The TDN 3-4819WISM from Traco Power is a DC to DC Converter with Input Voltage 18 to 75 V, Output Voltage 1 9 V, Output Current 1 0.333 A, Output Power 3 W, Isolation Voltage 1.6 kV. Tags: Surface Mount, Buck/Step down. More details for TDN 3-4819WISM can be seen below.