It carries a 9 A rated operational current in AC-3 utilisation category at voltages up to 440 V, and can switch motor loads up to 4 kW at 480 V AC 50/60 Hz. The 230 V AC coil includes a built-in bidirectional peak limiting diode suppressor, so you don't need to add an external snubber for inductive load switching.
The AC-1 rating of 20 A covers resistive loads like heaters. AC-4 is also listed for plugging and inching duty, though that's harder on the contacts. Heat dissipation is 1.3 W — modest enough that you won't need to derate adjacent components in a dense DIN-rail layout, but worth including in your panel thermal budget if you're stacking several contactors.
The 3 NO main poles and 1 NO auxiliary contact are wired via screw terminals. The built-in coil suppression means the control circuit sees less back-EMF, which extends the life of your PLC output or relay driving it.