The Siemens SENTRON 5SQ2570-2YA02 is a 2-pole miniature circuit breaker with C-curve tripping characteristic, rated 2 A at 400 V AC and 3 kA breaking capacity per EN 60898. It switches both line and neutral conductors, making it a 1+N-pole device in a 2-module width package. The IP20 finger-safe terminals suit enclosure-mounting in distribution boards or sub-panels.
Energy limiting class 3 means it restricts let-through energy during a fault, which helps with downstream device coordination. Neutral conductor switching (the N pole opens and closes with the line pole) provides full isolation on both conductors when the breaker is off — useful in TN or TT systems where switching the neutral is required by local code.
The 55 mm installation depth fits standard distribution board profiles. Two width units (36 mm) on the rail.