The purpose of the Schneider Electric 63 A C Curve XC60 MCB is to guard against overload and short circuit in your electrical system. Schneider A9N4P63C MCB Because it is composed of premium materials, it is strong and long-lasting. A four pole, 63 amp circuit breaker that satisfies IEC 60898 & IS/IEC 60898-1 standards is the Acti 9 63A 4P C Type MCB. This circuit breaker is perfect for industrial and commercial applications because it has a 15 kA breaking capacity. The Acti 9 series is a scalable, modular system that may be tailored to your application's unique requirements. The configurations of this circuit breaker include 4, 6, and 8 poles.