The 10 kA breaking capacity per IEC 60898-1 and 15 kA per IEC 60947-2 tell you the part can safely interrupt fault currents up to those levels — the 60947-2 figure is the one to use when the breaker is applied in an industrial panel with higher prospective fault current, while the 60898-1 rating covers the residential/commercial installation standard. Both are verified, so you don't have to guess which standard governs your application.
The 5SY4550-7 occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm — standard 1P+N MCB footprint that drops into any SENTRON distribution board or industrial enclosure. The quick assembly system means it snaps onto the rail without tools and the combined terminal top/bottom accepts both busbar and conductor connections. IP20 with connected conductors is the protection class, so it's intended for enclosed panel mounting, not exposed washdown areas.
The breaker is certified to IEC / EN 60898-1 and IEC / EN 60947-2, and also carries UL 1077 recognition — that three-standard coverage means it's accepted in European, UK, and North American installations. The sealable design allows the panel builder to lock the toggle position after commissioning, preventing unauthorized reset.