It's sensitive to phase failure, so it will drop the motor if one phase is lost, which is standard for IEC 60947-4-1 compliance.
Rated IP20 open-mounted, so it's meant for inside an enclosure, not out in the weather. The screw-clamp terminals accept up to 6 mm² solid or 4 mm² flexible with ferrule, torqued to 1.7 N·m. Comes with 1 NO + 1 NC auxiliary contact built into the front, which saves you buying a separate block for basic status feedback.
Rated for the load
Motor power ratings: 2.2 kW at 400/415 V, 3 kW at 500 V, 4 kW at 690 V — all three-phase 50/60 Hz. The 6.3 A rated current covers a small motor, say a pump or a conveyor drive up to that kW range. Electrical durability is 100,000 cycles at rated current in AC-3 duty, mechanical durability also 100,000 cycles. That's solid for a manual motor starter in a machine that cycles a few times an hour. The 100 kA Icu at 400 V means you can put this on a panel with a high-fault-capacity transformer without worrying about the breaker failing to clear a dead short.
This is a current-production part — no end-of-life notice on it. It carries approvals under EN/IEC 60947-2, EN/IEC 60947-4-1, UL 60947-4-1, and CSA C22.2 No 60947-4-1, so it's accepted in North American and European panels. Also listed for IEC/EN 60335-2-40 (heat pump/air conditioner) and IEC/EN 60335-1 Clause 30.2 (glow-wire). Fire resistance is certified to 960 °C per IEC 60695-2-11.