Blue Sea Rotary Switch 120VAC 30 Amp Off + 3 Position

The Blue Sea Rotary Switch 120VAC 30 Amp Off + 3 Position is a compact AC source selector designed for marine, RV, industrial, and backup power systems where multiple AC voltage sources need to be switched safely. This rotary switch eliminates the complexity of managing separate circuits when circuit protection is already in place elsewhere in your system. It is ideal for applications where operators must quickly select between two different 120V or 230V AC power sources feeding a single load.

Built by Blue Sea Systems, a trusted manufacturer of electrical switching and protection equipment, this rotary switch handles 30 amperes at 120VAC and includes an OFF position plus three active switching positions for flexible source management. The rotary design provides positive, tactile feedback with each position change, preventing accidental misselection of power sources. The compact footprint makes it suitable for tight panel installations, while the mechanical reliability of the rotary mechanism ensures thousands of cycles without wear or contact degradation—critical for systems requiring frequent source switching.

This switch is ideal for marine vessel owners managing shore power and onboard generator selection, RV enthusiasts switching between campground and auxiliary power, and industrial facilities with redundant AC feeders. Installation requires only basic electrical knowledge and standard panel cutout preparation; the rotary mechanism mounts directly to the control panel. Weight of 0.7 lbs ensures minimal panel stress, and the rugged construction withstands vibration and humidity typical of marine and mobile environments. For systems where UL-listed source selection is required without additional breaker complexity, this Blue Sea rotary switch provides a proven, compact solution.