What lands on the BOM line
The ACS800-01-0020-3+P901: The +P901 suffix is part of the order code itself, so the option must be carried into the PO line — substituting a base ACS800-01-0020-3 against a +P901 BOM entry changes what ships. Frame weight is listed at 6.35 kg, which puts the unit in the one-person lift class on a wall or panel backplate; no forklift, but the mounting anchors should still be sized for the working mass under vibration.
Cross-shop against the ACS880-01 family
The natural second-source the catalog carries is the ACS880-01 series, with ACS880-01-07A6-5 sitting at the same 6.35 kg weight figure as the ACS800-01-0020-3+P901 — a frame-size match, not an electrical pin-for-pin match. Drop-in to a panel built around ACS880-01-07A6-5 is not something the evidence supports as a no-rewire swap: ACS800 and ACS880 are successive generations with different control terminals, parameter sets, and fieldbus option mapping, so a panel-builder specified on ACS880 needs a wiring and parameter review before reusing an ACS800-01-0020-3+P901 in the slot.
Spec recap
Listed drive class is AC, sub-classed as Motor Drives under the ABB Drives portfolio, which sets the application context: a standard induction motor controller sized to the frame's current rating rather than a servo or low-harmonics specialist build.