The TSC 5039 from Traco Power is a DC to DC Converter with Input Voltage 36 to 75 V, Output Voltage 1 48 V, Output Current 1 4.5 A, Output Power 40 to 2500 W, Isolation Voltage 1 to 3 kV. Tags: Rack Mount, Buck-Boost. More details for TSC 5039 can be seen below.