The Siemens 5SY5463-7CC is a 4-pole DC miniature circuit breaker from the SENTRON family, built for DC branch-circuit protection. Rated 880 V DC with a C-tripping characteristic, it delivers 10 kA breaking capacity per IEC 60947-2 at DC — enough to clear high-energy faults on 400–750 V DC bus systems common in industrial drives, UPS, and solar combiner panels. The C-curve (5–10× In) handles moderate inrush from contactor coils or DC power supplies without nuisance trips.
DIN-rail fit and panel integration
Width of 72 mm (4 modular units) and depth of 76 mm (70 mm installation depth behind the panel) — standard 35 mm DIN-rail footprint. Mounting position any, fastens via the quick-assembly system (snap-on). The combined top and bottom terminals accept conductors with touch protection; IP20 with connected conductors means it is safe in enclosed panels but not for wet or dusty environments. Thermal derating is published: 59.85 A at 40 °C, 58.21 A at 45 °C, 56.57 A at 50 °C, 54.81 A at 55 °C — relevant when populating adjacent breakers in a crowded enclosure. Halogen-free and silicon-free construction for clean-room or sensitive electronics areas.