Miniature circuit breaker for final subcircuit protection
The SENTRON 5SQ2570-0KA05 is a 2-pole miniature circuit breaker (1P+N) with a C tripping characteristic, rated 5 A at 240 V AC, 50 Hz. The 1P+N configuration means it switches both the phase and the neutral, but only the phase is protected against overcurrent — the neutral pole is switched but not monitored.
IEC 60947-2 is the industrial standard; the same 3 kA figure confirms the breaker is also suitable for industrial control panels where the fault level does not exceed that threshold. Overvoltage category 3 (rated impulse withstand) and energy limiting class 3 (fast arc extinction) are consistent with a breaker intended for fixed installations with upstream coordination.
IP20 rated for dry indoor enclosures. The neutral pole is switched internally — no separate neutral bar required downstream of the breaker, which simplifies wiring in single-phase boards.