The Schneider Electric A9N19845 is a 2-pole miniature circuit breaker from the Acti9 C120L range, rated 80 A at 30 °C with a D trip curve. The 15 kA Icn breaking capacity at 400 V AC (conforming to EN/IEC 60898-1) and 15 kA Icu (conforming to EN/IEC 60947-2) means it can safely interrupt fault currents up to that level without welding contacts or cascading failure upstream — essential for panel coordination studies. Rated operational voltage is 400 V AC, insulation voltage 500 V AC, with a 6 kV impulse withstand rating. The thermal-magnetic trip unit provides both overload (thermal) and short-circuit (magnetic) protection in one device. Dual-standard certified to GB 10963.1 / EN/IEC 60898-1 for household-type MCB duty and GB/T 14048.2 / EN/IEC 60947-2 for industrial circuit-breaker application — so it qualifies for both residential distribution boards and industrial panel builds where the higher 60947-2 rating is required for SCCR.
Clip-on mounting to DIN rail, 6 module pitches (9 mm each = 54 mm wide). Tunnel terminals accept 1–50 mm² rigid or 1.5–35 mm² flexible. The toggle switch provides local ON/OFF indication and a contact position indicator confirms isolation status — suitable for lockout/tagout when used as an isolator (marked suitable for isolation per the standard).