The LC1E1801M5: AC-3 is the utilisation category for squirrel-cage motor starting: the 18 A rating means it handles a 3-phase motor drawing up to 18 A during running, with the inrush on make handled by the contactor's design. The same part also carries an AC-1 rating for resistive loads, though the evidence does not give the numeric value for that curve.
IP2X finger protection is built in, so it does not require an additional cover in a standard IP2X enclosure. The non-overlap time of 1.5 ms between NC and NO contacts on both energisation and de-energisation is a detail worth noting for safety circuits: it guarantees that the NC break before the NO make, preventing a momentary short across the coil circuit in reversing or interlocking applications.
Environmental and compliance envelope
The TH protective treatment per IEC 60068-2-30 means it is tested for damp heat — suitable for unheated warehouses or coastal plant rooms without condensation control. Operating altitude goes to 3000 m without derating, which covers most installations outside high-mountain sites.