What the ratings mean for fit
The Siemens 5SY4625-7 is a SENTRON 4-pole miniature circuit breaker (3P+N) with a C-curve trip characteristic — it holds through mild inrush (5–10× rated current) and trips fast on a hard short, which is the standard choice for general-purpose loads like contactor coils, small motors, and mixed lighting circuits in an industrial panel. Its dual-rated breaking capacity — 10 kA per EN 60898-1 and 20 kA per IEC 60947-2 — means it can safely interrupt a fault on a 400 V AC supply even when the available fault current at the panel is high; the 20 kA figure governs the SCCR coordination study for the branch circuit. At 72 mm wide (4 modular units) and 76 mm deep, it fits standard DIN-rail enclosures with a 70 mm installation depth; the neutral conductor is switched (3P+N), so it isolates all live conductors in a single operation — required for TT or IT systems and for any circuit where the neutral must be broken.
Lifecycle and sourcing reality
It carries approvals to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 / CSA C22.2 No. 235 (5 kA at AC per UL/CSA), which covers most industrial and commercial panel builds in North America and Europe. The part is halogen-free and silicon-free, which matters for clean-room or sensitive electronics environments where outgassing is a concern.
Panel integration notes
Mounts on a DIN rail via the quick-assembly system in any position. The combined terminal top and bottom accept supply from either end — no mandatory orientation. IP20 with connected conductors; pollution degree 3 and overvoltage category III suit it for the main distribution board inside an enclosure, not for wet-area installation.