The Schneider Electric DOM11343SNI is a Domae-series miniature circuit breaker — a single-pole, 20 A, C-curve device rated for 220-240 V AC distribution circuits. The C-curve trip characteristic means it holds through inrush up to 5-10× rated current — typical for small motor loads, lighting banks, and transformer-fed circuits — before tripping magnetically on a hard fault.
Clip-on DIN rail mount, occupies 2 × 9 mm pitches (18 mm total) on the rail. The grey housing is standard Domae — compatible with the Domae comb busbar and distribution block system, which simplifies daisy-chaining the line side across multiple breakers in a row. Toggle control, AC network only (50 Hz).