The 24 V AC 50 Hz coil keeps the control circuit separate from the power side, which is standard for panel builders who want clean isolation between the PLC output and the motor circuit.
AC-3 rating at 9 A means this contactor handles the inrush of a squirrel-cage motor during starting and breaks the load under running conditions — it's not a resistive-only switch. The AC-3e rating (same current) adds an energy-efficiency label for motor starters per IEC 60947-4-1. AC-1 rating covers resistive loads like heaters. The 1.5 ms non-overlap time between NC and NO contacts guarantees that the normally-closed and normally-open poles never close simultaneously during coil energisation or de-energisation — important for safety interlocks where you need a guaranteed break-before-make sequence.
IP2X protection means finger-safe against accidental contact, but it's not sealed — keep it inside a cabinet or enclosure, not out in the washdown zone.
It also meets EN/IEC 60335-1 Clause 30.2 for glow-wire / fire resistance and EN/IEC 60335-2-40 Annex JJ for heat pumps and air-conditioning applications. The 850 °C fire-resistance rating per IEC 60695-2-1 means the housing won't propagate a flame under fault conditions — a solid safety mark for panel approvals.