The 18-75C28NT620 from Acopian Technical Company is a DC to DC Converter with Input Voltage 18 to 75 V, Output Voltage 1 28 V, Output Current 1 4.3 to 6.2 A, Output Power 288 W, Isolation Voltage 0.3 kV. Tags: DIN Rail Mount, Buck-Boost. More details for 18-75C28NT620 can be seen below.