The Schneider Electric A9F45404 is an Acti9 iC60N miniature circuit breaker (MCB) with a D curve, rated 4 A, 4 poles, and a breaking capacity of 50 kA Icu at 415 V AC.
This MCB is dual-rated to EN/IEC 60898-1 (for household and similar installations) and EN/IEC 60947-2 (for industrial applications). At 440 V AC it still handles 25 kA Icu. For the 60898-1 rating, the Icn is 10 kA at 415 V. If your panel's prospective short-circuit current (PSCC) at the breaker's point of installation exceeds 10 kA, you must use the 60947-2 rating (Category A, meaning no intentional short-time delay). The 4 A rating on a D curve is a common choice for small motor circuits, solenoid valves, or control transformers where the inrush can be 8–12 times the full-load current.
The terminals accept 1–25 mm² rigid or 1–16 mm² flexible copper; strip length is 14 mm, tightening torque 2 N·m. The toggle control gives a clear on/off position, and the trip indicator shows whether the breaker has opened on fault. IP20 finger protection means it is safe for use inside an enclosed panel but not in wet or dusty environments. Padlockable for lockout/tagout procedures.