The SENTRON 5SQ2370-0KA02 is a 3-pole miniature circuit breaker (MCB) from the 5SQ series, rated at 2 A with a C tripping characteristic. It is designed for 400 V AC, 50 Hz systems and carries a 3 kA breaking capacity per EN 60898 — the standard for household and similar installations, certifying it for branch-circuit protection in residential and light commercial distribution boards.
The 3-pole format (3P, no neutral switching) occupies 3 width units on a DIN rail, with a 55 mm installation depth — standard for compact consumer-unit or sub-distribution enclosures. IP20 finger-safe terminals suit enclosed panel mounting; the part is not rated for exposed or washdown environments.
The C-curve trips at 5–10× rated current (10–20 A for this 2 A unit), making it suitable for moderate inrush loads such as small motor starters, lighting banks, and transformer primaries. Overvoltage category 3 and energy limiting class 3 are consistent with fixed-installation mains protection.