The A9F06320 is a 20 A, B-curve, 3-pole miniature circuit breaker from the Schneider Electric Acti9 iC60H series. Its 42 kA Icu at 12-133 V AC (per EN/IEC 60947-2) is the highest short-circuit rating on this voltage range — meaning it safely interrupts faults up to that level without upstream cascading in a 400 V distribution panel. The B-curve magnetic trip at 4 x In ±20 % (80 A nominal) is sized for resistive and general-purpose loads where inrush is low; it will nuisance-trip on motor or transformer starts, so verify the load type before committing the BOM line. Dual-rated to both EN/IEC 60947-2 (industrial) and EN/IEC 60898-1 (domestic/similar), this breaker qualifies for panel-building under either standard. The 20 A rating is the continuous current at 50/60 Hz; the thermal-magnetic trip unit handles overloads and short-circuits in one package.
The 3-pole body occupies 6 x 9 mm pitches (54 mm width), with a depth of 78.5 mm and height of 91 mm. IP20 finger-safe terminals accept double connections: 1-25 mm² rigid or 1-16 mm² flexible, top or bottom. The toggle control and trip indicator give local status without opening the panel door.