Battery Switch with Alternator Field Disconnect without Lock - Perko
Price: $46.45
Save: $14.74
(24% Off $61.19)
Part # 8503DP
2nd Day Air for $2.99 More Eligible
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On-Off type, available with new key lock option for extra theft protection.

  • AFD (Alternator Field Disconnect)
  • Marine UL Listed switches which surface mount.
  • Red plastic housing with improved design to protect electrical connections.
  • Large black plastic knob
  • Heaviest copper contacts
  • Stainless steel spring
  • Brass terminals.

AFD prevents damage to the alternator if the switch is switched to "off" while the engine is running.

Capacity: 250 amps Continuous, 360 amps Intermittent.
Diameter 5-1/4", depth, 2-5/8".

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Great drop-in replacement
by Eddie from Woodstock, Alabama on August 22, 2016
Bought as replacement for similar Perko switch that had gone bad
(0 of 1 people found this review helpful)
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works great
by Roy from Spring Grove, Pennsylvania on September 03, 2015
Axacty as described
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by Nancy from Terrace, British Columbia on June 06, 2012
Works well/ could have used some stainless screws.
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I bought a boat with this switch and I don't know anything about it. Can you please help?
Marine UL Listed. Make before break contact design makes power connections before breaking a connection for seamless transitions. For use with two or more batteries, for single or dual engine systems, (two switches are required for dual engines). Allows the addition of an extra battery for use with accessories.

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