Perko 8504DP Medium Duty Battery Selector Switch

This Perko Medium Duty Battery Selector Switch uses a polycarbonate body with brass terminals, ignition protected for use on 6 to 32 volt marine electrical systems. A 5/16-inch terminal stud size handles typical battery cable lugs without needing an adapter.

It's rated for 250 amps continuous, with a 360 amp intermittent rating for 5 minutes, enough headroom for real-world electrical loads without derating concerns. The switch measures 5-1/4 inches in diameter and 2-5/8 inches deep.

This version adds an alternator field disconnect along with a key lock. When used with non-unitized alternators, it interrupts the field current if switched off with the engine running, reducing the risk of alternator damage. Explore more battery management systems.

• Polycarbonate body, brass terminals, ignition protected
• 250A continuous, 360A intermittent (5 min)
• 5-1/4" diameter, 2-5/8" deep
• Alternator field disconnect and key lock