What the part actually is
The ABB ACS800-U1-0006-5+P901+B056 is a wall-mount AC drive out of the ACS800-U1 single-drive chassis family, sitting in the Motor Drives class under Motors & Motor Controls — the form factor an integrator reaches for when a single-motor cabinet needs DTC control without the footprint of a cabinet-built drive.
Ratings the buyer has to weigh
Package mass is 9.07 kgs — manageable for one installer on the backplate, with a second hand recommended when seating the chassis on the rails. Horsepower, voltage class, and the +P901 / +B056 option codes resolve off the nameplate, not the ordering ledger.
Where the class is used
ACS800-U1 single-drive chassis units run single-motor loads in cabinet-built sections — pumps, fans, conveyors, mixers — where DTC motor control matters more than the simpler V/Hz of a general-purpose inverter, and where the +P901 / +B056 style suffix string lets the panel-builder specify the control board, feedback option, or marine-style variants without leaving the same base frame.
ACS800-U1 has been superseded by the ACS880 wall-mount platform, so this MPN moves through the legacy channel. RFQ it against an existing cabinet BOM line and quote the +P901 / +B056 option string verbatim to keep the nameplate match.