The Schneider Electric A9F04270 is a 2-pole Acti9 iC60 miniature circuit breaker rated at 0.5 A with a C-curve trip characteristic.
At 400 V the Icu drops to 25 kA, and the Icn per EN/IEC 60898-1 is 10 kA at 400 V. The limitation class is 3 per EN/IEC 60898-1, meaning it lets through less energy than a standard breaker — useful for protecting downstream equipment in a short-circuit event.
Integration into the enclosure
The 78.5 mm depth fits flush in a typical distribution board without protruding past the front cover. Strip length is 14 mm. The IP20 finger-safe protection is adequate for enclosed panels; for wet environments, a separate enclosure or an IP-rated distribution board is needed.
Certified to both EN/IEC 60947-2 (industrial) and EN/IEC 60898-1 (household and similar) standards, so it qualifies for either a commercial panel or a residential consumer unit. The overvoltage category is IV, suitable for main incoming supply. The thermal-magnetic trip unit is non-interchangeable; the breaker is suitable for isolation (a positive contact position indicator confirms the state of the contacts).