The contactor is rated for 7.5 kW at 400 V in AC-2 duty (slip-ring motor starting) and 15.5 A at 400 V in AC-4 duty (plugging/inching). At 690 V it handles 11 kW, and it carries a mechanical life of 10 million typical cycles.
The AC-2 rating at 7.5 kW tells you this contactor is sized for slip-ring motor loads where the starting current is moderate — think crusher conveyors or mill drives that need controlled acceleration. The AC-4 rating at 15.5 A covers the severe inching and plugging duty that chews up a standard contactor quickly; this one is built to take that cycling.
The S0 frame is 45 mm wide and 85 mm tall, with a depth of 140 mm including terminals.
For Type 1 coordination (contactor may need replacement after a fault) use 63 A gL/gG fuses. The solid and stranded wire ranges are given for both the main and auxiliary circuits — 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) solid, and up to 2x 4 mm² solid on the auxiliary side; the main circuit accepts 2x (1 to 2.5 mm²) single/multi-stranded, 2x (2.5 to 6 mm²), and max 2x 10 mm². AWG equivalents are also listed.