13 A B-curve MCB — selectivity and derating at panel temperature
The Siemens SENTRON 5SY7313-6 is a 3-pole miniature circuit breaker rated 13 A with a B tripping characteristic, meaning it trips at 3–5× rated current — the standard choice for general-purpose resistive and low-inrush loads in commercial and industrial distribution boards. Breaking capacity is 15 kA per EN 60898 and 25 kA per IEC 60947-2, with a DC rating of 15 kA per IEC 60947-2 — enough headroom for most sub-distribution boards where the upstream transformer limits fault current below 15 kA. Derating matters in a warm panel: at 40 °C the breaker carries 12.48 A, at 50 °C it drops to 11.95 A, and at 60 °C it is 11.39 A — if your enclosure runs hot, size the load to the derated figure, not the 13 A nameplate.
Panel fit and mounting
Occupies 3 modular width units (54 mm wide) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm. Mounts in any position, uses a quick assembly system, and has combined terminals top and bottom — speeds up rail wiring in high-density panels. Rated IP20 with connected conductors, pollution degree 3, overvoltage category III — suitable for clean indoor environments like control cabinets and sub-distribution boards.
Lifecycle and sourcing
Halogen-free and silicon-free construction, sealable for lockout/tagout, and touch-protected terminals — meets the material and safety requirements for semiconductor fab and food-processing environments.