Perko 250 Amp Battery Selector Switch with Alternator Field Disconnect

Perko 8503 Medium Duty Battery Selector Switch with Alternator Field DisconnectThe Perko 8503 Battery Selector Switch lets you select individual batteries or combine them for engine starting, accessory power, and charging. Designed for 632 VDC marine electrical systems, it features an alternator field disconnect that interrupts field current on non-unitized alternators, helping reduce the possibility of damage if the switch is accidentally turned OFF while the engine is running.FeaturesMake-before-break operation allows switching between 1, ALL, and 2 while the engine is running.Ignition-protected design permits installation in gasoline-powered boat engine compartments.Polycarbonate body with brass terminals and an easy-to-turn selector knob.Surface-mount design uses Perkos traditional mounting bolt circle.Made in the USA.SpecificationsContinuous capacity: 250 ampsIntermittent capacity: 360 amps for 5 minutesDiameter: 5-1/4 inchesDepth: 2-5/8 inchesTerminal stud size: 5/16 inchInstallation Note: Alternator field disconnect protection applies to compatible non-unitized alternators. Follow Perkos installation instructions for proper wiring.View Perko 8503 Battery Selector Switch Installation Instructions (PDF)