The PUB2405S2M from Flex Power Modules is a DC to DC Converter with Input Voltage 21.6 to 26.4 V, Output Voltage 1 5 V, Output Current 1 0.4 A, Output Power 2000 mW, Isolation Voltage 3000 Vdc. Tags: Surface Mount, Buck/Step down. More details for PUB2405S2M can be seen below.