Marine Battery Disconnect Switch 12V 24V, 100A-300A for Boat and Car
Powerful, versatile, and built to endure marine environments, the Marine Battery Disconnect Switch provides reliable dual-battery control for boats, RVs, cars, and more. Designed for 12V-60V DC systems, it helps you isolate loads quickly to prevent battery drain, protect electronics, and simplify maintenance.
Main Description
This dual battery disconnect switch features a self-cleaning sliding contact design for stable performance across years of vibration and exposure. It supports 12V-60V DC systems and is available in current variants of 100A, 200A, and 300A, with continuous ratings around 275A, intermittent up to 455A, and cranking up to 1250A—making it suitable for demanding setups on boats, campers, and heavy-duty vehicles. The unit uses a rugged ABS plastic housing and four tin-plated copper studs (2 x 3/8" / 10 mm) for solid connections. It supports a Master switch with 1-2-Both-Off operation, allowing you to ON or OFF a single bank or both banks together, regardless of their individual switch states.
Recessed or surface mounting options make it easy to install on larger vessels or vehicles, and it can be integrated into contour lock systems to lock with other switches for enhanced security. The rear cover insulates terminals to reduce the risk of short circuits, and the CE-certified design adds peace of mind for EU installations. Suitable for marine boats, RVs, ATVs, cars, campers, travel trailers, trucks, and UTVs.
Benefits & Tips
- Use as a master disconnect to quickly isolate all loads during storage or maintenance, preventing battery drain and protecting sensitive electronics.
- Opt for the appropriate current variant (100A, 200A, or 300A) based on your dual-battery setup to ensure reliable performance and avoid overloading wiring.
- Leverage the 1-2-Both-Off configuration to control individual battery banks or both together, regardless of their own switches, for flexible power management on boats and larger vehicles.
Product Specifications
- Voltage: 12–60V DC
- Rated current (variants): 100A / 200A / 300A
- Continuous rating: 275A
- Intermittent rating: 455A
- Cranking rating: 1250A
- Stud size: 2 × 3/8" (10 mm) copper studs
- Configuration: Dual 1-2-Both-Off battery switch
- Housing material: ABS plastic
- Dimensions: diameter 7.5 cm; height 10 cm (approx. 7.5 × 7.5 × 10 cm)
- Weight: 270 g
- Mounting: Recess or surface mount
- Origin: Mainland China
- Certification: CE Certified
Package includes
- 1 x Car Battery Selector Rotary Switch
Warnings/Reminders
- Ensure wiring is sized to handle the maximum current of your chosen variant; use appropriate gauge wiring and fusing according to your system design.
- This device is intended for DC systems (12–60V). Do not connect to AC circuits.
- Install and mount per marine or vehicle electrical standards; use the rear cover to insulate terminals from shorts where applicable.
- Always disconnect power before installation or servicing.
All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
Providing quality and trusted service since 2002 at intercy Cyprus.com.