What it is on the BOM line
The ABB ACS800-U1-0020-5+P901 is the wall-mount (U1) frame of the ACS800 low-voltage AC drive family, classified on the Motor Drives line under Motors & Motor Controls / Drives / Motor Drives, and the listing title and description both call it out as an AC drive from ASEA BROWN BOVERI. The P901 suffix on the order string is an option-code tail on top of the base 0020-5 size, so the BOM line reads as one configurable drive SKU rather than a bare frame code.
Ratings and what they decide
The seed record carries one quantified figure: a mass of 15.88 kgs on the ACS800-U1-0020-5+P901 SKU. That puts the unit on the wall-mount lift range; a second person is prudent for cable-side handling. Current, voltage class, kW sizing, brake chopper, I/O and fieldbus are not on this ledger and are not restated here; the drive nameplate and the option-code break-out govern the electrical fit.