The 48C9FT550 from Acopian Technical Company is a DC to DC Converter with Input Voltage 48 V, Output Voltage 1 9 V, Output Current 1 3.8 to 5.5 A, Output Power 288 W, Isolation Voltage 0.3 kV. Tags: DIN Rail Mount, Buck/Step down. More details for 48C9FT550 can be seen below.