Ignition Protected

Utilizes a “make-before-break” design, for use with two or more batteries and single- or dual-engines. Alternator field disconnect prevents damage to alternator if accidentally switched to the “OFF” position while engine is running.


• Fiber-reinforced polycarbonate body.
• 1/2-inch diameter brass battery terminals.
• For use with systems under 50 volts.

Capacity: 380 amps continuous, 850 amps intermittent



DISPLAY PKG. – 2 PKGS.1 Piece per Pkg.


Face (In.)

Depth (In.)

5-1/4” x 5-1/4”


8603 DP




Take a look inside a typical battery switch and you’ll find small, spring-loaded “line contacts” that provide the electrical gateway to your system. These line-contact designs provide a very small conductive area for high current flow, resulting in critical wear, carbon tracking and contact burns over time. At Guest, we understand the key to long, efficient switch life is large contact surface area.

That’s why Guest switches feature an innovative “sweep contact” design, which provides a large, flat surface area for maximum

conductivity and efficiency, without the excessive wear, carbon tracking and contact burns of inferior line-contact designs. All Guest battery switches safely provide positive battery disconnect, isolate all circuits and conform to U.S.C.G. safety standard 183.410 for ignition protection.

Guest Battery Switches Features

• Heavy-duty copper sweep contacts.
• Positive click-stop on all positions.
• Built-in skirt protects connections.
• “Make before break” contacts allow selection of all positions except “off” while engine is running.
• Alternator Field Disconnect (AFD) models allow selection of any position, including “off”, without damage to alternator or electrical system.
• For 6, 12, 24 and 32 volt systems.
• Marine UL Listed.
• Momentary ratings are for five minutes continuous.
• 1-year limited warranty.

Guest ‘Sweep’ Contacts Are Just Better

Guest’s smooth, flat “sweep” contacts provide up to 60% more contact area than inferior line-contact designs. Our contacts are “machined” to guarantee an electrically sound path, while line-contact designs suffer from a lack of matched contact surfaces, leading to arcing and excessive carbon tracking. Guest contacts also provide a unique, self-cleaning sweep every time the switch is used, maintaining a matched contact area for maximum efficiency and long life.