Part identity and key ratings
The LC1E1801B7 is a 3-pole contactor from Schneider Electric's Easy TeSys Control range, rated for AC-3 and AC-3e utilisation at 18 A up to 440 V, with a 24 V AC coil at 50/60 Hz and one NC auxiliary contact built in. That AC-3 rating means it's sized for starting and stopping squirrel-cage motors under full load — the 18 A figure governs the motor current it can switch, not just carry.
The 80 mm depth and 74 mm height leave room for wiring ducts alongside.
Environmental and mechanical limits
Operates from -5 to 55 °C ambient, stores from -60 to 80 °C, and works at altitudes up to 3000 m without derating. The TH protective treatment (pollution degree 3 per IEC 60068-2-30) means it's tested for humid, tropical conditions — relevant if the panel sees condensation or high relative humidity.
Also meets EN/IEC 60335-1 Clause 30.2 and -2-40 Annex JJ for appliance applications — so it's accepted in HVAC and commercial equipment builds.