The A9F06406 is a Schneider Electric Acti9 iC60H miniature circuit breaker: 4 poles, 6 A rated current, B-curve trip characteristic. The B-curve trips magnetically at 4 x In (±20 %), meaning it clears short-circuit faults quickly on resistive or lighting loads where inrush is low — a good fit for control transformers, small power supplies, or general-purpose branch circuits where you want selectivity upstream of a C-curve breaker. Breaking capacity is the headline number here: 42 kA Icu at 12…133 V AC, 30 kA at 220…240 V, 15 kA at 380…415 V, and 10 kA at 440 V (all per EN/IEC 60947-2). Under the 60898-1 standard it carries 10 kA Icn at 400 V. For a 6 A frame that is serious fault-clearing headroom — you can install this near a large transformer or in a high-fault panel without worrying about cascading failure upstream.
The 4-pole body takes 8 x 9 mm pitches — 72 mm wide — so it occupies four module spaces in a distribution board. Height is 91 mm, depth 78.5 mm. Terminals accept double conductors: 1…25 mm² rigid or 1…16 mm² flexible, with a strip length of 14 mm and a tightening torque of 2 N.m. The toggle handle provides local on/off control and a trip indicator shows when the breaker has opened on fault. IP20 rated — suitable for installation inside an enclosed panel only.