The Schneider Electric LC2K0601G72 is a TeSys K reversing contactor, 3-pole, rated for AC-3 and AC-4 utilisation categories at 6 A up to 440 V, with a 120 V AC coil and one NC auxiliary contact. It's rated for operation up to 2000 m altitude without derating, which covers most standard industrial installations.
The AC-3 rating of 6 A at 440 V governs motor switching — that's the current the contactor can make and break for a squirrel-cage induction motor during starting and running. The AC-4 rating covers plugging and inching duty, which is harder on the contacts. If your application requires reversing under load (AC-4), this contactor is rated for it, but the electrical life will be shorter than AC-3-only duty. The 120 V AC coil is a fixed-voltage design — no dual-voltage or wide-range coil. Verify your control transformer taps before committing the BOM line. The 1 NC auxiliary is built in; if you need more auxiliary contacts, they must be added via the TeSys K add-on block (separate order). Mechanical robustness is documented: the contactor withstands 10 Gn shocks on X-axis and 15 Gn on Y and Z axes for 11 ms when closed, and 4 Gn vibration at 5-300 Hz when closed. That's sufficient for most industrial machinery but not for extreme mobile or marine environments without additional damping.