The LC1E1801Q7 is a 3-pole contactor from Schneider Electric's Easy TeSys Control range, rated 18 A in AC-3 utilisation category at ≤440 V with a 380 V AC 50/60 Hz coil and one NC auxiliary contact. AC-3 is the standard duty for starting and stopping squirrel-cage induction motors under full load — so the 18 A figure is the motor current it handles, not a resistive-heater current. This contactor carries a full suite of international approvals: EN/IEC 60947-1, -4-1, and -5-1 for low-voltage switchgear, plus GB/T equivalents for the Chinese market, and EN/IEC 60335-1 Clause 30.2 for glow-wire resistance in household appliances. Fire resistance is tested to 850 °C per IEC 60695-2-1. It's TH-treated for pollution degree 3 environments (condensation-prone panels) per IEC 60068-2-30.
Operating altitude is 3000 m without derating — above that, the air's lower dielectric strength and cooling capacity need a correction factor. The non-overlap time between NC and NO contacts is guaranteed at 1.5 ms on both energisation and de-energisation. This matters in reversing or star-delta starters where you need a dead time between contactors to prevent phase-to-phase shorts.