This TO219G 63A dual power manual transfer switch is an essential component for electrical systems requiring reliable power source switching. Operating at 400V 50/60Hz, this compact mini circuit breaker features a sophisticated interlock mechanism that prevents simultaneous connection to both power sources, eliminating the risk of cross-connection. The manual transfer functionality includes an isolating feature for enhanced operational safety during maintenance or emergencies. Its space-efficient design makes it ideal for installations where real estate is at a premium, while maintaining robust performance capabilities. The switch accommodates dual power supply inputs, making it perfect for systems requiring backup power options or alternative power source switching. With a current rating of 63A, this transfer switch is suitable for both residential and light commercial applications where reliable power switching is critical. The device features clear terminal markings and a straightforward installation process, helping ensure proper setup and connection. Its durable construction and quality components are designed to provide consistent, long-term performance in various electrical applications.