This LJSF-125 manual transfer switch offers versatile three-position functionality for managing multiple power sources, including grid, off-grid, and generator connections. Rated for AC 400V operations, this 100A circuit breaker features a robust interlock mechanism that ensures safe power source transitions while preventing simultaneous connections. The switch's thoughtful design incorporates dual power supply compatibility, making it an ideal choice for solar power systems and backup power applications. Its compact white housing enables straightforward installation in electrical panels, while the durable construction stands up to frequent use. The integrated interlock system provides reliable operation when switching between power sources, helping prevent electrical accidents and equipment damage. Perfect for both residential and commercial applications where controlled power source management is essential, this transfer switch delivers dependable performance in a space-efficient package.