Miniature circuit breaker — B-curve, 1-pole, railway-rated
The Siemens 5SY4116-6KK11 is a 1-pole miniature circuit breaker from the SENTRON family, designed with a B tripping characteristic for fast overcurrent protection on resistive and general-purpose loads. Rated 400 V AC (single-phase) and 60 V DC, it breaks fault currents up to 10 kA per EN 60898-1 and 20 kA per IEC 60947-2 — the higher IEC figure matters when you need SCCR headroom for industrial panel coordination.
Breaking capacity and selectivity
At 10 kA (EN 60898-1) this breaker covers standard domestic and light commercial fault levels. The 20 kA rating per IEC 60947-2 lets it sit upstream in an industrial sub-distribution board where available fault current is higher — without cascading into a bigger frame. The DC breaking capacity is 15 kA per IEC 60947-2 at 60 V, so it also handles battery-backed or rectified DC bus protection in the same panel.