The Onesto KC3E-163is a single-pole miniature circuit breaker engineered for reliable protection in domestic and industrial electrical installations. Rated at 63A with a 3KA breaking capacity, this device operates across 240/415V systems at 50Hz and conforms to IEC60947-2 standards. Its utilization category A classification ensures optimal performance in standard AC applications. The compact din rail design facilitates straightforward installation in distribution boards and control panels, delivering dependable overcurrent protection where it matters most.