Perko 8504DP Medium Duty Locking Battery Selector Switch with Alternator Field Disconnect

The Perko 8504DP is a medium-duty battery selector switch designed for marine electrical systems, featuring an integrated locking mechanism and alternator field disconnect protection. This essential marine electrical component allows you to manage power distribution between multiple battery banks while protecting your alternator from damage.

Key Features:

• Locking design prevents unauthorized switching while engine is running
• Alternator field disconnect interrupts field current when switched to OFF position with engine running, protecting non-unitized alternators from damage
• Durable polycarbonate body with brass terminals for corrosion resistance
• Ignition protected design meets marine safety standards
• Compatible with 6 to 32 volt marine electrical systems
• 250 amp continuous capacity, 360 amp intermittent rating for 5 minutes

Specifications:

• Mounting diameter: 5-1/4 inches
• Panel depth behind mounting surface: 2-5/8 inches
• Terminal stud size: 5/16 inch
• Four position selector: OFF, Battery 1, BOTH, Battery 2

Ideal for boats with dual battery systems, this switch allows you to isolate batteries for starting, combine them for heavy loads, or disconnect all power when the vessel is not in use. The alternator field disconnect feature is particularly valuable for older marine charging systems with non-unitized alternators.