The Schneider Electric A9K23463 is a 4-pole Acti9 iK60N miniature circuit-breaker rated 63 A at 30 °C with a B-curve trip characteristic (magnetic tripping between 3 and 5 times In). It clips onto a standard DIN rail and occupies 8 x 9 mm pitches (72 mm wide, 85 mm tall, 78.5 mm deep), so it fits a 4P slot in any Acti9 distribution board without crowding adjacent ways. Breaking capacity is 6 kA Icn at 400 V AC 50/60 Hz per EN/IEC 60898-1, which covers the majority of commercial and light industrial final-distribution boards where the prospective short-circuit current stays under that threshold. The limitation class is 3, meaning it lets through less energy than a class-3 limit curve — useful for protecting downstream cabling and loads without oversizing the breaker.
Trip unit and isolation
Thermal-magnetic trip technology handles overloads (thermal bimetal) and short-circuits (solenoid) in one compact package.
Durability and environment
Rated for 10,000 electrical cycles and 20,000 mechanical cycles — figures typical for a distribution MCB that sees occasional switching rather than daily load-break duty. The IP20 finger-safe terminals accept up to 35 mm² rigid wire with a 14 mm strip length; tightening torque is 3.5 N.m.