The TDN 3-4821WI from Traco Power is a DC to DC Converter with Input Voltage 18 to 75 V, Output Voltage 1 5 V, Output Current 1 0.3 A, Output Power 3 W, Output Voltage 2 -5 V. Tags: Through Hole, Buck/Step down. More details for TDN 3-4821WI can be seen below.