The A9P54320 is a Schneider Electric Acti9 iC40N miniature circuit breaker rated 20 A with a C-curve magnetic trip (5–10 × In per EN/IEC 60898-1, 8 × In ±20 % per EN/IEC 60947-2). Breaking capacity is 10 kA Icu at 400 V AC per EN/IEC 60947-2, and 6000 A Icn at 400 V AC per EN/IEC 60898-1. Dual-rated to both EN/IEC 60898-1 (domestic / commercial MCB standard) and EN/IEC 60947-2 (industrial circuit-breaker standard), so it qualifies for either a distribution board or an industrial control panel. Pollution degree 3 per 60947-2 means it's rated for the conductive-dust and condensation environment inside a typical unsealed enclosure.
DIN-rail integration and terminal details
The 3-pole body occupies 6 × 9 mm pitches — 54 mm total width — so it fills six module positions on the rail. Strip length 14 mm. IP20 finger-safe on the front face; IP40 inside the modular enclosure. Not rated for washdown — keep this inside a cabinet, not on the machine surface.
Carries OVE (Austria) and AENOR (Spain) quality labels. Dual-standard certified to EN/IEC 60898-1 and EN/IEC 60947-2. Suitability for isolation confirmed per EN/IEC 60947-2 — the toggle and contact-position indicator give a visible break for safe isolation during maintenance. Electrical and mechanical durability both rated at 20,000 cycles.