The 63 A rating at 230 V AC handles high-current loads like electric ranges, large water heaters, or submain feeders in a single-phase panel. The 6000 A Icn breaking capacity is the standard domestic level per IEC 60898-1; it safely interrupts a short-circuit fault up to that prospective current. The thermal-magnetic trip unit combines a bimetal strip for overload protection and a solenoid for short-circuit response.
The 18 mm width (2 modules) is standard for a 1P MCB at this rating — verify your enclosure's way count. Tunnel terminals accept rigid cable up to 35 mm² or flexible up to 25 mm²; strip 14 mm and torque to 3.5 N·m. The IP20 finger-safe front (IP40 inside a modular enclosure) is expected for a distribution board; no washdown rating. Comb busbar compatible for daisy-chaining line-side feeds across multiple breakers.