The Siemens SENTRON 5SQ2170-2YA32 is a 1-pole miniature circuit breaker (MCB) with a C-curve tripping characteristic, rated 32 A at 240 V AC and 50 Hz. It is designed for branch-circuit overcurrent and short-circuit protection in final distribution boards, lighting circuits, and general-purpose loads where moderate inrush currents (e.g., small motors, transformers, fluorescent ballasts) are expected. The C-curve means it trips magnetically at 5–10 times rated current — a good fit for mixed resistive-inductive loads that don't need the higher inrush headroom of a D-curve.
Rated breaking capacity is 3 kA per EN 60898 — the standard for household and similar installations. That's the maximum prospective short-circuit current the MCB can safely interrupt at its rated voltage. In a commercial or light industrial panel fed by a transformer with a low-impedance path, fault levels can exceed 3 kA; if your available fault current is higher, this breaker is not the right choice. For comparison, the 3-pole sibling 5SQ2370-2YA04 shares the same 3 kA rating but at 400 V and 4 A — same series, same fault-handling capability, different pole/current configuration.
Single modular width unit (1 MW) with an installation depth of 55 mm — fits standard DIN-rail enclosures used across the SENTRON 5SQ series.