The TEC 3-4821 from Traco Power is a DC to DC Converter with Input Voltage 36 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 TEC 3-4821 can be seen below.