What this MCB is and what the ratings mean for fit
The Siemens 5SL6108-7CC is a 1-pole miniature circuit breaker from the SENTRON 5SL series, designed for residential and infrastructure branch-circuit protection per EN 60898. Its 8 A rated current and C tripping characteristic mean it handles moderate inrush loads — think lighting banks, small motor starters, or general-purpose socket circuits — without nuisance tripping on start-up, while still clearing a sustained overload within the standard curve. The 6 kA breaking capacity at 230/400 V AC per EN 60898 is the spec that governs fault clearance: it safely interrupts a short-circuit current up to 6 kA without welding the contacts or cascading failure upstream. For a residential or light-commercial panel with a typical prospective fault current under 6 kA, this is the correct coordination point. Overvoltage category 3 and pollution degree 2 confirm it is rated for fixed-installation use inside a distribution board.
Physical fit and panel integration
At 18 mm width (1 width unit) and 76 mm depth (70 mm installation depth), this breaker occupies a single DIN-rail module. The 90 mm height is standard for the 5SL family, so it aligns with adjacent breakers and busbar systems. Mounting position is unrestricted — any orientation is permitted — and the IP20 rating (with connected conductors) is typical for enclosed distribution boards.
Environmental and compliance notes
Rated for ambient temperatures from -40 °C to 75 °C, with periodic exposure to +55 °C and 95% humidity. The housing is halogen-free and silicon-free, which matters for installations where off-gassing or silicone contamination could affect sensitive contacts or electronics. Vibration resistance per IEC 60068-2-6 is 50 m/s² at 25 to 150 Hz — adequate for most fixed installations, though not a marine or rail standard.