Perko 8504DP Alternator Field Disconnect Battery Switch, Keylock
- Brand:
- Perko
- Part no:
- 8504DP
Image: Fisheries Supply
Where to buy
Specifications
- Continuous rating
- 250 A
- Intermittent rating
- 360 amps intermittent
- Alternator field disconnect
- Yes
- Ignition protection
- Ignition protected
Manuals
- Installation instructions (PDF)it.perko.com
The Perko 8504DP is a battery switch with an alternator field disconnect and a keylock. It is rated for 250 amps continuous and 360 amps intermittent, and it is ignition protected. The design protects its copper contacts and brass terminals. It is meant for systems under 50 volts.
Our take
The alternator field disconnect is the feature that counts here: the switch is meant to prevent alternator damage if it is turned off by accident. With a 250 amp continuous rating and a limit of under 50 volts, check your system against both figures first.
From our buying guide
Perko says its selector switches can be switched between 1, ALL and 2 with the engine running, and that they let you put batteries in parallel for emergency starting. Battle Born advises against that connection with its LiFePO4 batteries.
Check before you buy:
- Its continuous and 5-minute ratings suit your system. Perko rates its medium-duty 8501 at 250 A continuous.
- It has an alternator field disconnect if you need one. Perko says its AFD models protect non-unitized alternators if the switch is turned OFF with the engine running.
- If it's going in a gasoline engine space, the maker lists it as ignition protected.