What this MCB is and where it fits
The Siemens 5SY4425-7CC11 is a 4-pole miniature circuit breaker from the SENTRON series, designed with a C-curve tripping characteristic and rated for 10 kA breaking capacity per EN 60898 at 400 V AC. It occupies 4 modular width units on a DIN rail and accepts supply from any direction, which simplifies panel layout when busbar routing is tight. The C-curve means it trips between 5 and 10 times rated current — the standard choice for general-purpose distribution circuits feeding motor starters, contactor coils, or lighting groups where moderate inrush is expected. The 10 kA short-circuit capacity at 400 V AC is the figure that governs selectivity coordination downstream; it matches the typical fault level at a sub-distribution board in an industrial or infrastructure installation.
Lifecycle and sourcing posture
This order code carries a current lifecycle stage. It is sourced to order against an RFQ through independent distribution channels — no minimum commitment, confirmed availability and pricing at quote time. For a BOM freeze or a spares replenishment, the 4-pole C-curve footprint and the 10 kA rating are the parameters to match; the railway-grade vibration spec and the halogen-free / silicon-free construction may also be requirements in the original specification.
Physical fit and panel integration
Width is 72 mm (4 modular units), depth 76 mm, height 90 mm, with an installation depth of 70 mm. The quick-assembly fastening method and combined top/bottom terminals mean the breaker clips onto the DIN rail and accepts busbar or wire entry from either end without reorienting the housing. Neutral conductor switching is not provided — this is a 4-pole protection device, not a switched-neutral MCB.