Cole Hersee Single Pole Brass Marine Battery Switch - 175 Amp - Continuous 1000 Amp Intermittent

The Cole Hersee Single Pole Brass Marine Battery Switch is a UL-listed master disconnect designed for marine electrical systems operating between 6V and 36V DC. This single-pole, two-position (off-on) brass switch provides a simple, reliable method to isolate battery power from vessel circuits—essential for safety during maintenance, equipment shutdown, and emergency power management on both small recreational boats and larger offshore vessels.

Electrical ratings vary by system voltage: the switch handles 250 amps at 6V DC and 125 amps at 12V DC in intermittent applications, with continuous ratings of 40 amps at 6V and 20 amps at 12V. The brass construction resists corrosion in salt-air environments where galvanic degradation compromises lesser materials. Silver or brass contacts ensure low-resistance switching with minimal voltage drop across the circuit. A lever actuator provides positive, tactile feedback and easy operation even with wet or gloved hands—critical in rough sea conditions or during emergency shutdown scenarios.

This switch suits both weekend anglers running modest 12V systems on center consoles and serious offshore crews managing complex multi-battery configurations aboard larger sportfishing or commercial vessels. It's equally valuable for cruising sailboats, trawlers, and any marine application where a master battery disconnect is required by safety standards or desirable for system isolation. The compact 4×4×9-inch footprint fits standard panel mounting, and the straightforward off-on logic eliminates confusion in emergency situations. Marine electricians and boat owners value Cole Hersee switches for their field-proven reliability and durability in demanding salt-water environments.