What it is and what it does
The A9N00R-10-84 is a NEMA Size 00 reversing contactor from Square D, rated 9 A at 600 V. Three poles, magnetic operation, with a 120 VAC / 60 Hz (110 VAC / 50 Hz) coil. Includes one N.O. auxiliary contact built in. Reversing contactors like this one swap two phases to reverse a three-phase motor — common on conveyors, hoists, and any line that needs forward/reverse without a separate switch. The 9 A rating covers small motors up to roughly 2–3 HP at 480 V, depending on duty cycle.
Lifecycle reality — EOL hot
If you are holding a line-down situation or a freeze on this MPN, the practical move is to quote against an RFQ and confirm availability before committing the build. A parametric substitute from the same NEMA 00 family may exist, but pin-to-pin compatibility needs a cross-check against the original panel layout.
What the ratings mean for fit
The 9 A rating is the continuous current the main contacts can carry in a reversing application. The NEMA Size 00 frame means the physical footprint is compact — mounts on a standard panel backplate, not a DIN rail. The 120 VAC coil draws its control voltage from a separate circuit; verify the control transformer matches the 60 Hz / 50 Hz dual-frequency note. Three poles handle three-phase motor loads. The built-in N.O. auxiliary can be wired for status feedback or interlocking. No N.C. auxiliary is included on this variant, so if your safety circuit needs a mechanically linked N.C., plan for an add-on block.