The PKB4110C from Flex Power Modules is a DC to DC Converter with Input Voltage 36 to 75 V, Output Voltage 1 2.64 to 3.63 V, Output Current 1 40 A, Output Power 132000 mW, Isolation Voltage 750 to 1500 Vdc. Tags: Through Hole, Surface Mount, Buck/Step down. More details for PKB4110C can be seen below.