The Siemens 5SL4406-6 is a 4-pole (4P) miniature circuit breaker from the SENTRON family, with a B tripping characteristic and a 6 A rated current at 30 °C. It's designed for residential and infrastructure branch-circuit protection per EN 60898 and IEC 60947-2, with a 10 kA breaking capacity under both standards — meaning it can safely interrupt fault currents up to 10,000 A without welding or arcing over.
Real-world ratings and derating
At 40 °C it derates to 5.76 A, at 45 °C to 5.64 A, and at 55 °C to 5.37 A — so if your panel runs hot, size the load accordingly. DC rating tops out at 72 V, so it's not a DC distribution breaker above that.
Mounting position is unrestricted — horizontal, vertical, upside-down, doesn't matter. IP20 with conductors connected, meaning finger-safe terminals but no washdown tolerance. Sealable, halogen-free, silicon-free — relevant if the panel spec calls for low-corrosion materials in a sealed enclosure.