The A9N18524 is a 4-pole Acti9 C120H miniature circuit breaker rated 100 A at 30 °C, with a D trip curve (magnetic trip between 10 and 14 times In). The 15 kA Icn at 400 V AC (per EN/IEC 60898-1) tells you it can clear a fault up to that level without welding its contacts; the IEC 60947-2 ratings go higher (30 kA Icu at 240 V) for industrial panel coordination.
D curve vs motor loads — the real selector
The D curve's 10–14 x In magnetic trip window is the deciding spec for motor circuits. A 100 A B-curve breaker trips magnetically at 3–5 x In — 300–500 A — which a 30 kW motor's starting surge can exceed. The D-curve on this C120H holds through 1000–1400 A peak, so it clears only a hard short, not a healthy start. That's the difference between a breaker that stays in and one that drops a conveyor on every restart.
Active production — no lifecycle worry
Current production, no phase-out or NRND notice on this order code. The Acti9 C120H series is Schneider's standard high-current MCB line for distribution boards and sub-distribution panels.
Dual-standard certification — what it covers
Certified to both EN/IEC 60898-1 (the MCB standard for household and similar installations) and EN/IEC 60947-2 (the industrial circuit-breaker standard). The 60898-1 rating gives you the Icn of 15 kA at 400 V for general distribution; the 60947-2 ratings give you Icu values at higher fault levels — 30 kA at 240 V, 15 kA at 415 V — for industrial panels where the prospective short-circuit current is known.