Blue Sea M Series Dual Circuit Plus Battery Switch

The M-Series Dual Circuit Plus Marine Battery Switch is a heavy-duty battery isolation switch designed for reliable power management on boats, RVs, and other 12V or 24V electrical systems. With a 300 Amp continuous rating and a 32V DC maximum operating voltage, it is ideal for outboard engines as well as small petrol and diesel-powered vessels.

Manufactured using marine-grade reinforced polycarbonate and tin-plated copper terminals, the switch delivers outstanding durability, excellent conductivity, and exceptional corrosion resistance in harsh marine environments. Its ignition-protected design makes it safe for installation aboard gasoline-powered boats, while the IP66-rated housing protects against powerful water jets for dependable operation in demanding conditions.

Designed for easy installation, the versatile case supports surface, front panel, or rear panel mounting, while the removable isolator cover allows cable entry from multiple directions. Long 7/8" (22.2mm) M10 studs accommodate multiple cable terminals, making the switch suitable for larger battery banks using cables up to 4/0 AWG (95mm²).

Ideal as a master battery disconnect or isolation switch, the M-Series provides safe battery isolation during maintenance, storage, or emergency situations.

• Heavy-duty 300A continuous marine battery switch
• Suitable for outboards and small petrol or diesel engines
• 32V DC maximum operating voltage
• Ignition protected for gasoline-powered boats
• IP66 waterproof housing resists powerful water jets
• Tin-plated copper M10 (3/8"-16) terminal studs
• One-piece terminal stud design prevents loosening
• 7/8" (22.2mm) long studs accept multiple cable terminals
• Accepts battery cables up to 4/0 AWG (95mm²)
• Reinforced polycarbonate housing for maximum durability
• Surface, front panel, or rear panel mounting options
• Isolator cover with multi-direction cable access
• Tactile ON/OFF knob position indicator
• International ON/OFF labels and circuit icon label set included
• Compatible with Paralleling Link Bus 8-29159
• Ideal for marine and RV electrical systems