The DOM11229SNI is a Domae-series miniature circuit breaker from Schneider Electric, configured as a 2-pole unit rated at 4 A with a C-curve trip characteristic.
Breaking capacity and what it means for your panel
The breaking capacity is 4500 A at 230 V AC, 50 Hz, conforming to IEC 60898-1. For a 4 A C-curve breaker, 4.5 kA is a standard domestic / light commercial rating — adequate for most final sub-circuits where the prospective short-circuit current at the board doesn't exceed that level.
Clip-on mounting to a standard DIN rail, 4 modules wide at 9 mm pitch (36 mm total). Toggle control for manual on/off and reset. Compatible with comb busbars and distribution blocks for clean phase distribution across multiple breakers in the same enclosure. Grey colour is the standard Domae housing — no special identification marking.