The Lenovo ThinkSystem 1100W (230V/115V) Platinum HS PSU, product code 01PF504-RFB, is a power supply for ThinkSystem server configurations.
It is rated at 1100W and specified for 230V/115V input. Lenovo identifies FRU 01PF504 as an Acbel 1100W power supply used in ThinkSystem servers, confirming the part family and server role.
This is a practical replacement part for a compatible server configuration that calls for this PSU reference.