What the line ships
The ABB ACH580-01-05A6-4+B056 is an inverter on the Motors & Motor Controls, Drives, Motor Drives line. The frame weighs 2.30 kgs, the handling and enclosure-thermal figure a panel builder plans against.
Frame sizing against the siblings a buyer actually weighs
The closest same-family cross-shop is the ACH580-01-014A-4, which jumps to 6.80 kgs — roughly three times the mass of the 05A6-4 frame. That gap reflects a step up in current rating and chassis size, not a direct panel swap: a cabinet laid out around the 05A6-4 footprint does not have the backplate area or the thermal headroom to accept the 014A-4 without rework.
Specifying it into the BOM
The +B056 suffix denotes the option string applied at order entry; the drive is built to that configuration rather than field-modified. For BOM freeze, lock the full order code ACH580-01-05A6-4+B056 on the purchase document. No lifecycle status is on record in the catalog row, so production state should be confirmed against the vendor's orderable list at RFQ time. The drive is quoted to order against an RFQ; send the full suffix string with the I/O and fieldbus requirements for a clean lead time.