Perko Heavy Duty Battery Disconnect Switch w/ Alternator Field Disconnect One Size. Heavy Duty Battery Switches Ignition Protected For use with 6 12 24 and 32 volt marine electrical systems Capacity - Rated 450 AMPS continuous 1200 AMPS intermittent (15 seconds on 5 minutes off) Heavy Duty Battery Disconnect Switch w/ Alternator Field Disconnect Specifications for Perko 9703DP Heavy Duty Battery Disconnect Switch w/ Alternator Field Disconnect: Manufacturer: Perko Amperage: 450 amps Color: Black Features of Perko 9703DP Heavy Duty Battery Disconnect Switch w/ Alternator Field Disconnect AFD: Yes Lockable: No Continuous Amperage: 450 Package Contents: Perko 9703DP Heavy Duty Battery Disconnect Switch w/ Alternator Field Disconnect Perko 9703DP: 9703DP Heavy Duty Battery Disconnect Switch w/ Alternator Field Disconnect One Size