The Onesto KC3E-363 is a robust 3-pole miniature circuit breaker engineered for industrial and commercial electrical installations. Rated at 63 amperes with a 3kA breaking capacity, this DIN rail-mounted device provides reliable overcurrent protection across single and three-phase systems operating at 240V or 415V. Compliant with IEC60947-2 standards and optimized for 50Hz applications, it delivers utilization category A performance. The grey finish ensures durability in demanding environments while maintaining straightforward installation and operation.