Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key - Black

The Blue Sea 6004200 Single Circuit ON-OFF with Locking Key in black is an essential control hub for serious boaters managing critical electrical circuits. This switch is ideal for primary engine systems, navigation arrays, or essential cabin power, providing reliable isolation and security in a compact design. With years of experience on the water, you understand that electrical reliability is crucial, and this quality main switch is where that reliability begins.

Engineered by Blue Sea Systems, this single-circuit switch features heavy-duty contacts and a key-operated locking mechanism to prevent accidental disconnection or tampering. This is particularly important for offshore operations or when leaving your vessel unattended. The panel-mount design integrates seamlessly into standard marine electrical enclosures, and the robust black finish is resistant to corrosion from salt spray and humidity.

Ideal for captains who demand rugged and foolproof electrical control, the Blue Sea 6004200 can be installed as your main battery disconnect, engine start circuit lockout, or for any single high-load circuit requiring positive control and security. It handles the amp draw your boat demands and fits standard 2-1/16" cutouts on electrical panels, ensuring a clean installation without bulk.