The Schneider Electric LC1E40M6 is a 3-pole contactor from the Easy TeSys Control range, rated 40 A in AC-3 duty at up to 440 V with a 220 V AC coil. AC-3 is the standard utilisation category for squirrel-cage motor switching — starting and stopping during running, not plugging or inching — so the 40 A figure is the motor current it handles in that cycle. The same contactor also carries AC-3e (enhanced motor switching) and AC-1 (resistive load) ratings, giving flexibility for heater banks or lighting circuits on the same panel. That matters when the contactor drives a reversing starter or a star-delta transition — you need that guaranteed break-before-make to avoid a phase-to-phase short through the power circuit.
Dimensions are 75 mm wide, 127 mm high, 114 mm deep — the depth is the dimension behind the panel face, so check gland-plate clearance if the enclosure is shallow.
That covers the contactor as a switching device, its motor-starting duty, and the control-circuit auxiliaries. Also listed for EN/IEC 60335-1 Clause 30.2 and -2-40 Annex JJ, which means it meets glow-wire and fire-resistance requirements for appliance and HVAC applications.