The Perko 9703DP Heavy Duty Battery Disconnect Switch is rated 450A continuous and 1200A intermittent, ignition protected for 6 to 32 volt systems.
Twelve hundred amps intermittent is the figure that matters on a diesel, and it is rated at 15 seconds on followed by five minutes off. That duty cycle is not a footnote. A large diesel cranking draws enormous current briefly, and a switch rated for continuous duty alone would be undersized for the moment it actually matters.
Ignition protection allows installation in a gasoline boat’s engine space, where an unprotected switch has no business at all. Any arcing contact near fuel vapor is a hazard, and the certification is what confirms the switch will not provide the ignition source.
Four hundred and fifty amps continuous suits demanding starting and distribution work rather than a small boat. This is a disconnect rather than a selector, so it isolates a single bank rather than choosing between two. Explore more battery switches.
- 1200A intermittent at 15 seconds on, five minutes off
- That duty cycle is the rating, not a footnote
- Ignition protected for a gasoline engine space
- A disconnect isolates one bank, it does not select
