The PKE5311 from Flex Power Modules is a DC to DC Converter with Input Voltage 18 to 75 V, Output Voltage 1 4.5 to 5.5 V, Output Current 1 6 A, Output Power 30000 mW, Isolation Voltage 1500 Vdc. Tags: Through Hole, Buck/Step down. More details for PKE5311 can be seen below.