The 9-18AB18A333 from Acopian Technical Company is a DC to DC Converter with Input Voltage 9 to 18 V, Output Voltage 1 18 V, Output Current 1 1.33 to 3.33 A, Isolation Voltage 0.5 kV, Operating Temperature -20 to 71 Degree C. Tags: Chassis Mount, Buck-Boost. More details for 9-18AB18A333 can be seen below.