What this MCB does on the rail
The Siemens SENTRON 5SL4103-7CC is a 1-pole miniature circuit breaker rated 3 A with a C tripping characteristic, breaking capacity of 10 kA per EN 60898. At 30 °C it carries the full 3 A; derate to 2.84 A at 40 °C, 2.76 A at 45 °C, 2.67 A at 50 °C, and 2.59 A at 55 °C — the thermal curve governs real-world panel loading when the enclosure runs warm. Single-pole construction (1 MW width) snaps onto a DIN rail, occupies one modular unit (18 mm wide), and accepts conductors up to the listed cross-section.
Integration notes
Mounts in any position, installs 70 mm into the panel behind the DIN rail. Sealable terminals and halogen-free / silicon-free construction suit infrastructure and residential building installations where fire-load and outgassing limits apply.
Rated for overvoltage category III, pollution degree 2, and vibration resistance 50 m/s² at 25 to 150 Hz per IEC 60068-2-6. Single-phase AC rated 250 V; multi-phase operation rated 440 V AC.