Part identification
The ABB ACS550-U1-017A-6+B055 is a member of the ACS550 series of general-purpose drives, specified for the motor drives role in industrial automation panels. The suffix +B055 denotes the factory option code applied to this build, while the ACS550-U1 frame and 017A current rating identify the standard catalog position within the family. It sits in the Motors & Motor Controls > Drives > Motor Drives category.
Panel-side footprint and handling
The unit weighs 5.67 kgs — light enough for a single-installer panel mount but heavy enough that the cabinet subpanel should still be rated for the mechanical load, especially when several drives are stacked vertically. In a rolling-mill cabinet adjacent to a megawatt drive, keep adequate clearance for cooling airflow; the ACS550 frame relies on ambient air movement across the heatsink fins, and anything that chokes that path will trigger an overtemperature fault long before the motor complains.
Sourcing posture
No production-status entry is recorded for this MPN in the evidence bundle, so lifecycle position is not asserted here. The order code is specified into the BOM and quoted to order against an RFQ, and the ACS550 family is progressively superseded by the ACH580 platform in ABB's catalog.