It breaks fault currents up to 4.5 kA at 400 V AC per EN 60898 — that is the standard for residential and light commercial distribution boards, so it clears a bolted fault on a 10 A lighting or socket circuit without the upstream device needing to coordinate.
IP20 with connected conductors; the terminals are finger-safe only when wired.
If your fault level at the panel exceeds 4.5 kA, step up to the 5SL4363-7 sibling which carries 10 kA under both EN 60898 and IEC 60947-2. The 10 A rating at 400 V three-phase means each pole protects a 10 A load; total power loss per pole is 1.2 W in hot state, so three poles dissipate 3.6 W — factor that into enclosure thermal calculations if the board is densely populated.