MCB for branch-circuit protection
The Siemens SENTRON 5SN6306-6CN is a 3-pole miniature circuit breaker rated 6 A with B tripping characteristic, designed for 400 V AC 50 Hz systems.
Accepts solid or stranded conductors from 0.75 to 25 mm²; screw terminals torqued to 2.5–3 N·m. Mounting position is unrestricted, and the housing carries touch protection (IP20 with conductors connected). Halogen-free and silicon-free construction suits environments sensitive to outgassing — clean rooms, food processing, medical.
Rated for ambient temperatures from -25 to +45 °C operating, with storage range -40 to +75 °C. Withstands periodic 55 °C at 95% humidity. Overvoltage category III, energy limiting class 3. Sealable for tamper evidence. No neutral conductor switching.