DC-rated MCB for 220 V circuits
The Siemens 5SY5163-7CC is a 1-pole SENTRON miniature circuit breaker rated for 63 A at 220 V DC, with a maximum DC voltage of 250 V. It carries a C tripping characteristic — the standard choice for moderate inrush loads like contactor coils, small DC motors, and control transformers where the startup surge is a few times the rated current but not extreme. That rating governs the available fault current the breaker can handle on a DC bus — if your panel's prospective short-circuit current exceeds 10 kA at the breaker terminals, you need a current-limiting device ahead of it or a higher-rated unit.
Width is 18 mm (one modular unit), depth 76 mm, height 90 mm. The terminals are combined (top and bottom), accepting conductors for the rated current without needing a separate busbar adapter for the line side.