The HPE 865399-101-RFB is a refurbished 500 W Flex Slot power supply for compatible servers. Its assembly part number is 865399-101. The plug-in module supports hot-plug replacement in a redundant power configuration, making it suitable for servers set up with a matching Flex Slot bay and backup supply.
It accepts AC input from 100–240 V at 50–60 Hz through an IEC 60320 C14 inlet. 80 PLUS Platinum certification and a stated efficiency of 94% describe its power conversion specifications. The listing identifies the unit as low-halogen.
Listed compatible systems are HPE ProLiant DL360 Gen10, DL380 Gen10 and ML350 Gen10.