9 A AC-3 — the load-switching ceiling
The Eaton A9-30-10-80 is a 3-pole IEC contactor rated 9 A motor current in AC-3 duty (switching squirrel-cage motors) and 21 A general-purpose in AC-1 resistive loads. The 240 V AC coil is standard for North American panel control circuits — it pulls in cleanly on a 240 V control transformer secondary. The built-in 1 N.O. auxiliary contact block eliminates the need for a separate side-mount add-on, saving a DIN rail position and one wiring step during panel assembly. The A9 frame footprint mates with the matching overload relay in the same A-Line series.
End-of-life — sourcing reality
For a BOM line that needs a drop-in replacement, the closest functional fit is another 3-pole IEC contactor in the 9 A AC-3 class with a 240 V AC coil and a built-in auxiliary. The panel wiring and DIN rail footprint are standard across this class — the replacement will occupy the same slot but the terminal layout may differ slightly.
Panel fit and duty context
Rated 600 V insulation class — this contactor handles 480 V motor branch circuits common in industrial panels. The 9 A AC-3 rating covers fractional-horsepower motors up to about 3 HP at 480 V three-phase; the 21 A AC-1 rating covers resistive heater banks or lighting contactor duty. The 240 V AC coil draws its holding current from the control transformer — no DC power supply needed. The A9 frame snaps onto standard 35 mm DIN rail; the 1 N.O. auxiliary is wired as a seal-in contact or a status feedback to the PLC.