The Siemens 5SJ6110-7CC is a 1-pole miniature circuit breaker (MCB) with a C-trip curve, rated 10 A and a 6 kA breaking capacity at 230/400 V AC. The 70 mm height fits standard distribution board cutouts alongside other 1-module-wide devices.
At 10 A it protects a 2.5 mm² copper circuit in most domestic and light commercial panels. The 6 kA breaking capacity at 230/400 V AC means it safely interrupts a fault current up to 6,000 A without welding contacts or cascading failure upstream — sufficient for most sub-distribution boards where the prospective short-circuit current stays under that threshold.