SENTRON 5SQ2570-2YA05 — 2-pole MCB, C-curve 0.5 A
The Siemens 5SQ2570-2YA05 is a SENTRON miniature circuit breaker with 2 poles (1+N), rated 0.5 A at 400 V AC with a C tripping characteristic. The neutral pole switches internally, so this unit covers both phase and neutral in a single 2-module width (2 width units at 18 mm each).
The 0.5 A C-curve is the load-bearing spec here — it trips at 5 to 10 times rated current (2.5–5 A magnetic release), sized for low-current lighting or control transformer secondaries, not motor circuits.
DIN-rail integration and spacing
Two width units (36 mm total) — the 1+N layout saves one module compared to a 2-pole breaker with separate neutral, useful when panel space is tight. IP20 finger-safe terminals; wire at the front with the panel de-energized.