The Schneider Electric A9P42606 is a 6 A miniature circuit breaker from the Acti9 iC40 series, configured as 1P+N with a B tripping curve. Breaking capacity is 6 kA Icu at 230 V AC per EN/IEC 60947-2, and 4500 A Icn at 230 V AC per EN/IEC 60898-1. That dual-rating means it's certified for both industrial (60947-2) and residential/commercial (60898-1) applications — so it fits a panel spec'd to either standard without an extra line item. The B curve trips magnetically between 3 and 5 times In (18–30 A), with a tighter 4 x In ±20 % band under 60947-2.
Tunnel terminals accept 1–16 mm² rigid or 1–10 mm² flexible, with a 14 mm strip length and 2 N·m tightening torque. That covers the common panel-building wire sizes — 2.5 mm² for final subcircuits, 4 or 6 mm² for feeder tails — without needing adapter lugs. IP20 on the terminals, IP40 inside a modular enclosure.
Certified to EN/IEC 60898-1 and EN/IEC 60947-2, with KEMA and IMQ quality marks. Pollution degree 3 (industrial environment, not just clean office panels). Rated for 20000 electrical and 20000 mechanical cycles — that's the standard endurance for a thermal-magnetic MCB in this class. For high-cycling loads (frequent switching under load), you'd want a contactor upstream; for normal branch-circuit protection, this covers the panel's service life.