The Schneider Electric A9F03263 is a 2-pole miniature circuit breaker from the Acti9 iC60N range, rated at 63 A with a B-curve trip characteristic. It's built for distribution in residential, commercial, and light industrial panels where you need to protect cable and equipment against overload and short-circuit. Magnetic tripping occurs at 4 x In +/- 20 %. Suited for resistive or general-purpose loads with low inrush, like lighting, heating, or control circuits. Rated 63 A continuous, with a breaking capacity of 36 kA Icu at 12-133 V AC, 20 kA at 220-240 V, and 10 kA at 380-415 V. That's enough for most secondary distribution panels; the 10 kA at 400 V aligns with typical utility transformer fault levels.
Certified to both EN/IEC 60898-1 (the household MCB standard) and EN/IEC 60947-2 (the industrial breaker standard). That dual rating means it's acceptable in domestic consumer units and industrial switchgear — useful if your BOM crosses both worlds.
Height 91 mm, depth 78.5 mm. IP20 finger-safe when installed in a panel.