The Siemens 5SL4108-8 is a 1-pole SENTRON miniature circuit breaker with a D tripping characteristic, rated 8 A at 400 V AC. The 10 kA breaking capacity (per EN 60898 and IEC 60947-2) tells you it can safely interrupt a fault current up to that level without welding contacts or cascading upstream; that's the standard for residential and light commercial distribution boards in most European and Asian installations. The single-pole format (1P) switches the line conductor only, so it's used in single-phase branch circuits or as a phase-level protector in multi-pole assemblies.
Deployment context
The manufacturer lists suitability for residential buildings and infrastructure, which aligns with the 10 kA SCCR and 400/230 V network voltages common in those environments.
Halogen-free and silicon-free construction, rated for ambient temperatures from -40 °C to +75 °C with up to 95% humidity at +55 °C. Sealable design allows lockout/tagout for maintenance isolation.