Blue Sea Systems 350 Amp E-Series Battery Switches Selector 4 Position. Switches isolated battery banks to all loads or combines battery banks to all loads. Includes AFD (Alternator Field Disconnect) Ignition protectedsafe for installation aboard gasoline powered boats IP66 waterproof, ISO 8846 and meets ABYC requirements Terminal Stud Size: 3/8" - 16 Continuous rating: 350A, Maximum voltage: 32V DC