What the order code says
ACS380-040C-02A6-4+K490 is a specific ABB order code: base 040C-02A6-4 in the 4 class and option suffix +K490. Verify the suffix, base current code, and voltage class match the BOM line before any rating review.
Where the ACS380 class sits on the floor
The ACS380 line is ABB's machinery-oriented AC drive, used for motor control on standalone machines and small process skids where a compact drive with onboard comms and I/O is preferred over a cabinet-format drive. In a mill environment the fit is for non-traction zones — auxiliary rolls, coiler helpers, conveyor sections, pump and fan skids — anywhere you need motor speed control away from the main megawatt drives. The 1.81 kg frame puts panel mounting on the table for this build, with the +K490 option dictating the fieldbus/IO set that the controls integrator wires to the upstream PLC. Keep this drive away from the radiant heat zones around the reheat furnace and the main stand drives; that is environmental segregation, not a rating claim on this part.
Sourcing posture
No obsolescence signal is on record for this order code; tie the +K490 suffix and the 040C-02A6-4 base code to the panel drawing and PO line to avoid wrong-drive pallet errors.