What this contactor is
The ABB A95-30-11-51 is a 3-pole, non-reversing across-the-line contactor rated for 145 A with a 480 V AC coil. It carries one normally-open and one normally-closed auxiliary contact. This is a full-voltage starter component for three-phase motor and resistive load switching in industrial control panels.
The 1 NO + 1 NC auxiliary contact block is built in, not a bolt-on. That covers one status feedback and one interlock, but leaves no spare aux for additional signaling without an add-on block.
Physical footprint
At 1.80 kg, this is a substantial frame — plan for a DIN-rail or backplate mount with adequate support. The mass matters for shipping and for panel layout; a single-person lift is fine, but the panel structure needs to handle the cantilever load during dropout.