HPE 879447-001-RFB power distribution board is a refurbished server replacement part for the ProLiant ML350 Gen10. HPE’s service guide identifies part 879447-001 as the power distribution board for this server.
The board serves the redundant power supply distribution function. It is a server component, rather than a standalone power supply; its role is to distribute power within the supported system. The listing describes it as a power supply backplane and confirms its refurbished condition.