Blue Sea 7623 ML-Series Heavy Duty Automatic Charging Relay - 24V

The 7623 Manual Control Battery Switch is an essential component for marine and boating enthusiasts, providing seamless control over your vessel’s electrical systems. Designed for reliability and safety, this switch ensures your boat’s electronics operate smoothly, whether you’re cruising on calm waters or navigating challenging conditions.

Key Features

• Manual Control: Offers an added level of safety with a manual switch, allowing you to control the system with or without power and providing a "Locked Off" mode for safe servicing.
• Coil Voltage: Operates efficiently on 24V systems, ensuring compatibility with most marine electrical setups.
• Included Accessories: Comes with the ML-Series Remote Control Contura Switch PN 2146 for convenient remote operation.

Technical Specifications

Specification	Details
Continuous Rating	500 Amperes
Current Draw	Less than 10 mA in "ON" or "OFF" states; moderate current during state changes
Stud Size	3/8"-16 tin-plated copper studs
Stud Length	7/8" (22mm) – accommodates multiple cable terminals
Contact Material	Silver alloy for high reliability switching live loads

Advanced Functionality

• Magnetic Latch (ML)-ACR: Maintains low current draw in both "ON" and "OFF" states, ensuring energy efficiency.
• Start Isolation (SI): Configurable for temporarily isolating house loads from the engine circuit during engine cranking, protecting sensitive electronics.
• Engine Isolation (EI): Allows isolation of two engines running simultaneously, safeguarding engine electronics and maximizing alternator output.
• Battery Monitoring: Senses charging on two separate battery banks to ensure optimal power distribution.
• High-Output Alternator Support: Compatible with alternators up to 500 Amps, providing robust power handling for demanding marine applications.

Visual Indicators

The switch features LED indicators that remotely display the system status, including:

• Battery combination status
• Isolation modes
• Voltage lockout conditions
• Start and Engine isolation states

Durability and Reliability

Built with corrosion-resistant materials, the 7623 Manual Control Battery Switch ensures long-lasting performance in harsh marine environments. The tin-plated copper studs provide maximum conductivity, while the label recesses are designed for easy circuit protection installation.

Safety Warning

WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit P65Warnings.ca.gov.

Additional Resources

• Owner's Manual (PDF)
• Brochure (PDF)

Learn More

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.