The Schneider TeSys K LC1K12013B72 is a 3-pole contactor rated 12 A in AC-3 duty at ≤440 V, which means it switches three-phase motor loads up to that current — the rating that governs real motor starting, not the higher AC-1 resistive figure. Motor power capability runs 4 kW at 480 V AC, 5.5 kW at 380–415 V, and 3 kW at 220–230 V, so you match the contactor to the line voltage feeding the motor. The 24 V AC coil includes a built-in bidirectional peak limiting diode suppressor, saving you the separate snubber on the panel layout.
The 1 NC auxiliary contact is integrated into the same 45 mm footprint — no add-on block needed for a basic status feedback. Heat dissipation is 1.3 W, so thermal rise in a crowded enclosure is manageable without forced cooling.