What you're specifying
The ABB ACS800-U1-0050-5+P901 is an ACS800 series low-voltage motor drive in the wall-mount U1 frame, listed under Motors & Motor Controls / Drives / Motor Drives, and the listing carries the +P901 option code as part of the order string. At 30.84 kg, this is a two-hand lift into a panel — not a shelf part — and the cabinet has to carry that mass at the mounting points before the first power-on.
Where this class sits in a panel
ACS800-U1 drives are the wall-mount variant of ABB's industrial low-voltage family, used to run standard induction motors in standalone cabinets and MCC cells where a drives-only section is preferred over a book-format drive.
Same-family cross-shop
The ACS880-01-065A-5 is the ACS880 wall-mount successor in the same form-factor family; it comes in lighter at 23.13 kg versus the 30.84 kg on this listing, and any swap has to be evaluated against the ACS880's current slot and the ACS800 parameter set already in the cabinet.
Sourcing posture
No lifecycle or production-status entry is on file for the seed MPN, so the part is sourced to order against an RFQ rather than declared active or declared obsolete from this record.