The Siemens SENTRON 5TT5052-0 is an insta contactor rated for 63 A operational current on a 230 V AC coil, with a contact configuration of 2 normally-open and 2 normally-closed poles. At 63 A, it handles the full load current of a large resistive or moderate motor load — think a 22 kW heater bank or a 15 kW motor under AC-1 duty — without needing a separate contactor for the neutral. The 230 V AC control coil is standard across European panel builds, so it drops straight into a 230 V control transformer circuit without a step-down.
Snap-on DIN rail mounting, 3 modular width units (53.5 mm wide), 71 mm depth, 64 mm installation depth — fits a standard 4-module enclosure with room for a 1-module auxiliary or a blank. IP20 finger-safe terminals; wire at 230 V control voltage with the panel dead. The 2 NC contacts can be wired as a feedback loop to a PLC or safety relay to confirm the contactor has dropped out before the next sequence starts.