The Siemens SENTRON 5SL4225-6 is a 2-pole miniature circuit breaker (MCB) rated 25 A with a B tripping characteristic, designed for 400 V AC residential and infrastructure branch circuits. The 10 kA breaking capacity (identical per EN 60898 and IEC 60947-2) means it can safely interrupt a fault current up to that level without welding contacts or cascading upstream, which covers the vast majority of utility-side fault levels in commercial and residential distribution boards.
Occupies 2 modular width units (36 mm wide, 90 mm tall, 76 mm deep, 70 mm installation depth). IP20 with connected conductors — fine inside an enclosed distribution board or panel, not for wet or exposed locations. Sealable, halogen-free, silicon-free construction suits environments where outgassing or contamination is a concern, such as clean rooms or food processing areas.
Installation flexibility
Rated for overvoltage category III, pollution degree 2, and a mechanical service life of 10 000 operating cycles typical.