The Siemens 5SY4110-8CC11 is a SENTRON miniature circuit breaker (MCB) with a D tripping characteristic, rated 10 A at 400 V AC, 50/60 Hz. The 10 kA breaking capacity per EN 60898 tells you it can safely interrupt a fault current up to 10,000 A at 400 V, which is standard for most industrial sub-distribution panels.
Where and how it fits
Single-pole (1P), 18 mm wide — one width unit on a standard DIN rail. The quick-assembly system and combined terminals top and bottom simplify busbar and outgoing wiring. Conductor cross-section accepts 0.75 to 35 mm² solid or stranded, with a tightening torque of 2.5 to 3.5 N·m.
Design specifics for railway and industry
The 5SY4110-8CC11 is explicitly designed for railway applications (per) and is also marked suitable for mechanical engineering and industry. It's halogen-free and silicon-free, which matters in environments where outgassing can contaminate sensitive contacts or optics. Sealable and touch-protected — the sealable feature lets you lock the toggle position after commissioning, preventing unauthorized switching in safety-critical circuits.