Our battery disconnect switches are constructed with brass and copper components featuring a tinned core and insulated ABS plastic housing. The tinning process enhances oxidation and discoloration resistance of the copper while maintaining optimal conductivity, improving rust protection and extending service life. Designed to withstand harsh marine environments, this switch ensures reliable performance and safety. This battery disconnect switch is engineered for safety. When a vehicle or boat is not in use, it safely cuts off power supply from the battery, preventing parasitic drain and preserving battery life without compromising system integrity. These waterproof battery isolator switches feature a compact and durable design, making them ideal for use in cars, buses, RVs, SUVs, motorcycles, trucks, pickup trucks, yachts, and other vehicles. Suitable for installation as a main battery disconnect switch across various automotive and marine applications. Rated for intermittent current up to 150 A and continuous current up to 100 A at a maximum of 32 VDC. Cranking capacity: 500 A for 5 seconds. Contact resistance: 50 mΩ. Insulation resistance: minimum 100 MΩ at 500 VDC. Mounting bolt diameter: 6 mm. The switch features clear on/off position markings for intuitive operation. "ON" indicates circuit closed (power enabled), "OFF" indicates circuit open (power disabled). The locking cap can be pulled out and rotated to prevent accidental activation, providing added security. Simply rotate the knob to achieve the desired switching state.