The A9N19847 is a Schneider Electric Acti9 C120L miniature circuit breaker, 80 A rated current at 30 °C, 4 poles, D curve, with a 15 kA breaking capacity at 400 V AC — that's the Icn per EN/IEC 60898-1 and the Icu per EN/IEC 60947-2, so it's rated for both residential and industrial fault-clearing duty. Clip-on to standard DIN rail, 12 module pitches wide (9 mm each, so 108 mm), with tunnel terminals accepting up to 50 mm² rigid or 35 mm² flexible.
80 A at 30 °C is the continuous rating — that's the current it can carry without tripping in a 30 °C ambient. That's a solid SCCR for a distribution board fed by a transformer of typical impedance. Dual-standard compliance (EN/IEC 60898-1 for household-type MCBs and EN/IEC 60947-2 for industrial breakers) means it's accepted in both residential and commercial/industrial panels — one part for mixed-duty installations.
Panel integration
Clip-on DIN-rail mount, 12 module positions (108 mm wide), 81 mm tall, 73 mm deep — fits standard distribution boards and sub-panels. Toggle actuator with ON/OFF local indication. Accepts 1–50 mm² rigid or 1.5–35 mm² flexible — covers most panel wiring from subfeed to load conductors.