What it is
The ABB ACS800-U4-0140-5+D150+P901 is an AC cabinet-format drive built on the ACS800-U4 platform, with the D150 and P901 option codes appended to the base order string — that suffix combination is what tells the integrator this is not a wall-mount module but a cabinet build intended for floor-standing panel integration. Listed under Motors & Motor Controls, Drives, Motor Drives, it carries the classic ACS800 cabinet-drive form factor rather than the later ACS880 wall-mount footprint, which is the first thing to settle when sizing a replacement slot.
Cross-shopping the ACS880-01
That is the honest answer to the panel-rather-than-rewire question: the ACS880-01-156A-5 is the successor-platform alternative for new builds, but it is not a bolt-in substitute for an installed ACS800-U4 cabinet drive without mechanical and wiring rework.
Sourcing posture
Buyers chasing a hard spare for a line that already runs an ACS800-U4 cabinet drive should specify the exact suffix string (D150 + P901) when requesting a quote so the build matches the existing option set and the commissioning parameter file drops in without rework.