200A 51-302 51-902 12-24V Master Battery Disconnect Switch Car Boat Truck RV

200A 51-302 51-902 12-24V Master Battery Disconnect Switch for Car Boat Truck RV

This 200A master battery disconnect switch with OEM cross-reference numbers 51-302 and 51-902 is a heavy-duty electrical cutoff device for 12-24V systems in cars, boats, trucks, and RVs. It provides a secure way to isolate the battery to prevent drain, theft, or electrical fire during storage or service.

Overview

This 200A master battery disconnect switch is designed to handle high current in 12V and 24V electrical systems, allowing you to cut all power from the battery instantly. It is built for cars, boats, trucks, and RVs where a reliable battery disconnect switch is essential for maintenance, safety, and theft prevention. The switch features a robust rotary action to ensure a firm connection and clean break every time.

Built For Performance

• Rated for continuous 200A and surge current up to 200A for high-demand starting circuits
• Works with both 12V and 24V electrical systems
• Heavy-duty brass or copper contacts ensure low resistance and minimal voltage drop
• Compact surface-mount design fits most battery terminals or firewall locations
• Includes key or knob operation for easy manual disconnection
• Corrosion-resistant housing for marine and outdoor use

Fits These Machines

• for Car
• for Boat
• for Truck
• for RV

On-The-Job Use

• Disconnect battery during long-term storage of cars, boats, or RVs to prevent parasitic drain
• Shut off power when working on electrical components to avoid short circuits or accidental starts
• Use as an anti-theft cutoff in trucks and trailers when parked
• Isolate the battery during welding or maintenance on marine or automotive electrical systems

Specs At A Glance

Good To Know

Q: Will this disconnect switch work with a 24V truck system? A: Yes, this 200A master battery disconnect switch is rated for both 12V and 24V systems, making it suitable for passenger vehicles and commercial trucks. Verify your system voltage and current draw before installation.

Q: Can this switch handle starting current from a diesel engine? A: The switch is rated for 200A continuous, which covers most starting circuits in cars, boats, trucks, and RVs. For very high-cranking engines, confirm the peak surge rating matches your starter draw.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.