What this order code is
The ACS580-01-12A6-4: On the listed card it carries a part weight of 2.07 kgs, which puts it on the small-frame end of the ACS580-01 line — a one-person lift onto a panel backplate rather than a hoist job.
Cross-shop note vs the 031A-2
Within the same family the listed mechanical footprint widens sharply with current: the 031A-2 sits at 2.99 kgs while the 065A-4 lands at 19.05 kgs and the 180A-4 at 54.43 kgs, which means anyone chasing a second source should stay on the same current rating and voltage class, not just the same family prefix.
Sourcing posture
For the BOM line, the part is sourced to order against an RFQ; raise a same-class alternate only after the buyer confirms the target current rating and supply class.