Features 1.First On Then Off Contact Design: The battery switch is a single circuit switch. Switching a single battery to a single load bank. First on, then off contact design allows switching between battery packs without interrupting power. 2.Waterproof and Ignition Protection: The disconnect switch is designed to be IP66 waterproof and ignition protected. Can be safely installed on gasoline powered boats with a 300A continuous rating for outboard and small gasoline engines. 3.Conductivity and Corrosion Resistance: The tinned copper studs have excellent conductivity and corrosion resistance, and the studs accept 3/8in (M10) toroidal terminals and 7/8in (22 mm) stud lengths to accept multiple cable terminals. 4.Integrated Terminal Block: The disconnect switch also has an integrated terminal block design that will not loosen for security. 5.Isolation Cover: This disconnect switch has an isolation cover to secure the rear contacts and a breakaway lug to allow wire access in any direction. Housing design allows for face, rear panel or front panel mounting options. Specification Item Type: Battery Disconnect SwitchContinuous Rating: 300AIntermittent Rating: 500A (5 minutes)Startup Rated 30 seconds: 900AWiring Post Size: 3/8in-16 (M10)Terminal Post Length: 7/8in (22mm)Protection Grade: IP66Switch Gear: OFF, ONMaterial: ABS, tinned copperInner Stud: Tinned copperFunction: ON then OFF contact design allows switching between battery packs without interrupting powerApplications: Ideal for marine or RV applications Package List 1 x BatteryDisconnectSwitch4 x Screw