The Siemens SENTRON 5SL4663-7 is a 4-pole (3P+N) miniature circuit breaker rated 63 A with a C-curve trip characteristic, designed for 400 V AC multi-phase circuits and delivering 10 kA breaking capacity per both EN 60898 and IEC 60947-2. At 63 A and 4 modular width units (72 mm wide), this is the high-current end of the 5SL6 family; it occupies four 18 mm DIN-rail slots.
The 10 kA breaking capacity is the same under both EN 60898 (household standard) and IEC 60947-2 (industrial standard), so this breaker qualifies for either classification without derating. The 400 V AC rated voltage with a 440 V AC maximum on multi-phase operation means it handles standard 230/400 V three-phase networks cleanly, with headroom for nominal line swell. DC rated at 72 V maximum — usable for DC distribution only at low voltage, not for 125 V DC battery banks.
Snap-on DIN rail mounting, any position. The 72 mm width (4 MWU) is the same footprint as four single-pole breakers ganged; verify your enclosure's gland-plate knockout pattern if you're swapping from a 3-pole unit. Sealable (padlockable toggle) for lockout/tagout compliance.