It is rated for AC-3 duty at 5.5 kW at both 500 V and 690 V, which covers the common 400 V and 690 V industrial supply voltages across Europe and other 50/60 Hz regions.
For more severe switching, like plugging or inching, the AC-4 rating is 8.5 A at 400 V, which is the current the contacts can interrupt during frequent reversals or jogging. The main circuit uses spring-loaded terminals, accepting solid or stranded conductors from 2x 0.25 to 2.5 mm² (2x 24 to 14 AWG). That's a standard range for control wiring up to the rated motor current — no ferrule crimping needed for solid wire, which speeds up panel wiring. The auxiliary contacts are rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V, covering typical PLC and relay interface signals. This is the spec the panel designer needs to size the branch circuit protection.