What it is and what it does
The Siemens 5SL4213-6CC is a 2-pole miniature circuit breaker (MCB) rated 13 A, B-curve, with a 10 kA breaking capacity at 400 V. The B-curve means it trips between 3 and 5 times rated current — standard for resistive or general-purpose loads where inrush is low. The 10 kA SCCR at 400 V tells you it can safely interrupt a fault up to that level without cascading upstream, which matters for panel coordination studies.
Panel integration
Snap-on DIN rail mount, standard 2-pole width. The 400 V rating covers line-to-line single-phase or two-pole switching. Group code P310 and product group 3822 are Siemens internal cataloguing.