The Onesto KC3E-306 is a three-pole miniature circuit breaker engineered for reliable protection in domestic and industrial electrical installations. Rated at 6 amperes with a 3kA breaking capacity, this DIN rail-mounted device operates across 240V single-phase and 415V three-phase systems. Compliant with IEC60947-2 standards and designed for 50Hz applications, it delivers utilization category A performance. Its compact grey housing integrates seamlessly into distribution boards, providing dependable overcurrent protection for general-purpose circuits and equipment.