D50 series Circuit Breaker for equipment, the products use hydraulic magnetic technology, the latest international standards for structural design of advanced reasonable and applicable to the exchange of Pathology, AC230V/415V or DC 65V/80V/120V/125V electrical system for the overload protection circuit, short-circuit protection, but also for non-frequency fan access and the breaking use, has been widely used in communications equipment, laser equipment, railway locomotive, gasoline generators and other fields.