The Siemens 5SL6310-6 is a SENTRON miniature circuit breaker (MCB) with a 3-pole design, B tripping characteristic, and a 10 A rated current at 400 V AC. Its 6 kA breaking capacity, certified per both EN 60898 and IEC 60947-2, handles standard residential and infrastructure branch-circuit faults without cascading upstream. The B-curve trips between 3 and 5 times rated current, making it a fit for resistive and general-purpose loads where inrush is moderate — think lighting, socket outlets, or control transformers. Rated for 50/60 Hz networks, it occupies 3 modular width units (54 mm) on a DIN rail.
Thermal derating and real-world current
The 10 A rating holds at 30 °C ambient. At 40 °C it derates to 9.52 A, at 45 °C to 9.2 A, and at 55 °C to 8.74 A. If the panel runs warm — common in a crowded enclosure — the continuous load should be sized against the derated figure, not the 30 °C number. The 1.6 W power loss per pole at rated current in hot operating state adds up; for a 3-pole breaker that's 4.8 W dissipated inside the enclosure, so ventilation or spacing matters when grouping several MCBs.
Panel integration and environmental limits
Mounts in any position on a DIN rail; the 54 mm width (3 MW) and 76 mm depth fit standard distribution boards. Installation depth is 70 mm. Rated IP20 with connected conductors — fine for enclosed panels, not for washdown zones. The operating temperature range spans -40 °C to 75 °C, covering most indoor and sheltered outdoor cabinets. Pollution degree 2 and overvoltage category III are typical for fixed-installation branch circuits. Sealable, halogen-free, and silicon-free construction matters for environments sensitive to outgassing (clean rooms, medical, or certain industrial zones).
Supplementary devices and mechanical endurance
The design accepts installable supplementary devices (auxiliary switches, shunt trips, alarm contacts) — useful for remote status or emergency-off integration. Mechanical service life is rated at 10,000 operating cycles typical, which covers routine switching for a panel's service life. Energy limitation class 3 means it limits let-through energy well, reducing stress on downstream equipment during a fault.