What this order code is
The ABB ACS800-U1-0050-5+B056+D150+P901 is a wall-mount ACS800-U1 family AC drive carrying the +B056, +D150 and +P901 plus-code suffixes, sitting in the Motor Drives category. The full string is the order code a buyer commits to the BOM — the suffix codes are factory-selected options, not field-installed accessories, so the line must be quoted against this exact string to keep the option set intact.
Series fit and class
The ACS800-U1 line is ABB's wall-mount single-drive chassis in the broader ACS800 family, and the U1 suffix fixes it to the panel-mounted form factor used in standalone cabinet builds rather than the book-format / factory-assembled modules. The Motor Drives classification here confirms the slot in the BOM is a low-voltage VFD, so motor-side sizing (kW, frame, service factor) is what drives selection — not starter or servo logic.
Peer MPN delta — what the alternative families look like
The ABB ACS550-U1-072A-4+B055+L512 lists at 34.02 kgs, the same as the seed drive, but uses the ACS550-U1 frame with plus-codes +B055 and +L512. Panel footprint and lift handling carry across; the firmware toolchain does not. The ABB ACS550-U1-059A-4+B055 shares the ACS550-U1 form factor and lists at 36.29 kgs, within the same lift-handling class as the seed drive. Mass delta is small enough to avoid a chassis re-rate.