The SENTRON 5SQ2370-2YA32 is a 3-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated 32 A at 400 V AC, and a breaking capacity of 3 kA per EN 60898. It occupies 3 modular width units on a DIN rail, with an installation depth of 55 mm. The C-curve means it trips between 5 and 10 times rated current — suited for moderate inrush loads like motor starters and small transformers where a B-curve would nuisance-trip but a D-curve would delay too long.
Thermal derating and panel fit
Rated 32 A at 30 °C, the 5SQ2370-2YA32 derates to 30.4 A at 40 °C and 27.2 A at 60 °C — a consideration when packing multiple breakers into a sealed enclosure with limited airflow. The 3-pole design (3P) does not switch the neutral conductor. Pollution degree 3 and overvoltage category 3 mean it's rated for industrial panels where conductive dust or condensation is present. IP20 finger-safe terminals suit enclosed panel mounting; the 55 mm depth fits standard distribution boards without gland-plate interference.