Blue Sea Systems HD-Series Heavy Duty Battery Switch Switches isolated battery banks to all loads or combines battery banks to all loads Ignition protectedsafe for installation aboard gasoline powered boats. IP66 waterproof, ISO 8846 and meets ABYC requirements Accepts two 4/0 AWG (95mm) battery cables. Terminal Stud Size: 1/2" Continuous Rating: 500A, Max Voltage: 32VDC