The Schneider Electric DOM11344SNI-B is a Domae-series miniature circuit breaker (MCB), single-pole, rated 25 A with a C-trip curve and a 4.5 kA breaking capacity at 230/400 V AC 50/60 Hz per IEC 60898-1.
Tunnel terminals accept 1 to 25 mm² rigid or 1 to 16 mm² flexible conductors; tighten to 2 N·m. The toggle actuator provides a clear contact-position indicator for panel walk-downs.
This order code is marked obsolete by the manufacturer. If you are freezing a new design, a current-production Domae or Acti 9 MCB with the same 25 A, C-curve, 1P, 4.5 kA rating is the functional equivalent to specify in; the DIN-rail footprint and terminal range are identical.
The 25 A rated current (In) is the continuous current the MCB carries without tripping at 30 °C ambient. The C-curve characteristic (5–10× In magnetic trip) is the right choice for circuits with motor inrush or capacitive loads that would nuisance-trip a B curve. Electrical endurance is rated at 10,000 cycles under load; mechanical endurance matches at 10,000 cycles.