What this 13 A B-curve MCB does on the rail
The Siemens 5SL4113-6 is a 1-pole miniature circuit breaker from the SENTRON family, rated 13 A at 30 °C with a B tripping characteristic and a 10 kA breaking capacity tested to EN 60898. At 40 °C the continuous rating derates to 12.01 A, and at 55 °C it drops to 10.35 A — so if the panel runs hot, size up one step or account for the thermal curve. The B curve trips between 3 and 5 times rated current, which suits resistive and general-purpose loads in residential or light commercial infrastructure panels. It occupies a single modular width (18 mm) on the DIN rail, installs in any mounting position, and has an IP20 rating with conductors connected — standard for enclosed distribution boards.
Breaking capacity and voltage — what the ratings mean for fit
The 10 kA rated short-circuit capacity per EN 60898 (also 10 kA per IEC 60947-2) tells you this breaker can safely interrupt fault currents up to that level at 400 V AC without welding its contacts or failing catastrophically. That is the standard domestic and light commercial fault level in most European installations; if your prospective short-circuit current at the panel exceeds 10 kA, you need a higher-rated device upstream. The single-pole rating covers 250 V AC phase-to-neutral; multi-phase operation goes to 440 V AC. DC rating is 72 V maximum — usable for DC sub-circuits but not for 110 V DC battery banks.
Panel integration — one module wide, any position
The 5SL4113-6 snaps onto a standard 35 mm DIN rail and takes up exactly one 18 mm modular slot. Installation depth is 70 mm behind the panel face; overall depth including the front is 76 mm. The housing is halogen-free and silicon-free, which matters for panels in clean-room or corrosive environments where outgassing contaminates contacts or optics. Touch protection is built in, and the unit is sealable — useful for metering or tamper-proof applications. Overvoltage category III and pollution degree 2 are standard for fixed-installation distribution boards.