What it is, and why a controls integrator cares
The ABB ACS550-PD-046A-2+B058 sits on the ACS550 platform in the PD frame, catalogued under Motors & Motor Controls › Drives › Motor Drives, and carries the +B058 option suffix that the family uses to denote a factory-configured build variant — so a buyer sourcing this exact code is matching a specific configuration, not a generic frame. At 34.02 kgs the drive is a panel-floor or wall-mount unit, not a DIN-rail spare — plan lifting and clearance before the crate is opened, and size the gland plate to suit the PD-frame footprint rather than a smaller U1 outline.
Sourcing posture for the BOM line
No production-status or successor entry is carried on this seed order code, so the only sourcing posture that can be quoted is qualitative: the ACS550-PD-046A-2+B058 is specified into the BOM by its exact suffix string and supplied against an RFQ, with no claim of active manufacture, last-time-buy, or obsolescence made on the buyer's behalf.