What ships under this code
The ABB ACS550-U1-097A-4+B055 is an AC drive in the ACS550-U1 frame, ordered under the exact code ACS550-U1-097A-4+B055 so the +B055 option is factory-fitted and not a field retrofit. It sits in the Motor Drives class under ABB's drives portfolio — the same family the rest of the ACS550-U1-xxxA-4 range is built on. Listed mass is 23.59 kgs, which puts this frame in the two-person lift category — panel cut-out, gland plate sizing and door-hinge rating all need to be sized for that mass before the drive goes in.
Sourcing and lifecycle posture
ABB is the brand of record on this code; no production-status entry is on file, so active factory production today is not stated in the evidence — that gap belongs in an RFQ reply, not on a spec line. Quoted-to-order against an RFQ is the right sourcing posture for this code: confirm serial-number availability, firmware revision on the nameplate, and the +B055 option code as built before release.
Cross-shop against the nearest same-frame peer
The closest same-class peer is the ACS550-U1-096A-4 at 19.96 kgs, a one-amp-frame step down in the same U1 housing that shares the panel footprint and field-wiring geometry of the -097A-4 build.