The AC-3 rating of 6 A at 440 V governs motor switching — that is the load current during starting, not the steady-state run current. For resistive loads (AC-1), the contactor can handle a higher current, but the AC-3 figure is the one that decides whether it survives inrush on a pump or fan motor. The 1.5 ms non-overlap time between NC and NO contacts ensures break-before-make, which matters in reversing or interlocking circuits.
IP2X means finger-safe from the front but not sealed; keep it inside an enclosure. Rated for 3000 m altitude without derating, and TH treatment (pollution degree 3) handles humid, mildly corrosive atmospheres.
Complies with EN/IEC 60947-1, -4-1, -5-1, and GB/T equivalents, plus EN/IEC 60335-1 Clause 30.2 and -2-40 Annex JJ for appliance applications. Vibration resistance: 1.5 Gn open, 3 Gn closed; shock: 7 Gn open, 10 Gn closed.