The A9N19856 is a Schneider Electric Acti9 C120L miniature circuit breaker, single-pole, rated 125 A at 30 °C with a C curve (magnetic trip 5–10× In per IEC 60898-1, 8× In ±20% per IEC 60947-2). Breaking capacity is 15 kA Icn/Icu at 230 V AC, 50/60 Hz, certified to both IEC 60898-1 and IEC 60947-2. This is a thermal-magnetic design with tunnel terminals accepting 1–50 mm² rigid or 1.5–35 mm² flexible conductors.
Above that temperature, thermal derating applies — the breaker will trip at a lower sustained current.
Clip-on mounting to DIN rail. Occupies 3 module pitches (9 mm each, total 27 mm) on the rail. Depth is 73 mm, height 81 mm. The toggle provides local ON/OFF indication.
Compliant with GB 10963.1, EN/IEC 60898-1, GB/T 14048.2, and EN/IEC 60947-2. Rated insulation voltage 500 V AC, rated impulse withstand voltage 6 kV. Electrical durability 5000 cycles, mechanical 20000 cycles.
