The Siemens 5SY4113-7CC11 is a SENTRON miniature circuit breaker (MCB) — one pole, C-curve, rated 13 A at 400 V AC.
Where it fits and how it mounts
Snaps onto a DIN rail via the quick-assembly system — 18 mm wide (one width unit), 90 mm tall, 76 mm deep. Installation depth is 70 mm.
The 10 kA breaking capacity at 400 V AC (per EN 60898) is the key coordination number — it tells you this MCB can safely interrupt a fault up to that level without welding contacts or venting arc gas into the enclosure. If your panel's prospective short-circuit current exceeds 10 kA, you need an upstream current-limiting device or a higher-rated breaker. Energy limiting class 3 means it restricts let-through energy enough to protect downstream wiring in most installations.