The Siemens SENTRON 5SY4302-6 is a 3-pole miniature circuit breaker (MCB) with a B tripping curve, rated 10 kA breaking capacity per EN 60898 and 35 kA per IEC 60947-2 at 400 V AC. The 10 kA figure under EN 60898 is the standard household/commercial rating; the 35 kA under IEC 60947-2 gives you the industrial selectivity headroom — a panel designer uses the higher number for coordination studies when the MCB sits downstream of a larger breaker or fuse.
Mounting and integration — DIN-rail fit and spacing
The 5SY4302-6 occupies 2 modular width units (MW) on a DIN rail, with a width of 54 mm, depth 76 mm, and height 90 mm. The quick-assembly fastening method snaps onto the rail without tools. Installation depth is 70 mm, which matters when you're sizing a shallow gland plate or back-panel clearance. IP20 protection with connected conductors — standard for inside a panel; no special sealing needed for dry indoor locations.
Environmental range and suitability for mill or industrial environments
Halogen-free and silicon-free construction is a plus in corrosive atmospheres — no halogens to form acids if the breaker arcs, and no silicone outgassing that could foul contacts in sensitive control circuits. Degree of pollution 3 and overvoltage category III confirm it's rated for the conductive-dust and transient conditions typical of industrial switchgear — not just clean office environments.