KACOLA 500A Battery Disconnect Switch 12–36V — Lockable High-Current Cut-Off, Corrosion-Resistant

The KACOLA 500A High Current Battery Disconnect Switch is a heavy-duty, lockable master cut-off that isolates 12–36V battery systems and safely handles continuous 500A with surge capacity to protect electronics and prevent battery drain.

This compact, marine-grade switch gives you a simple, reliable way to disconnect battery power for maintenance, storage, or emergency isolation. Built from corrosion-resistant metal and copper internals, it replaces common part number 20247 and is designed for demanding environments where vibration, moisture, and heavy current are factors.

How does this switch protect my vehicle or boat electronics?

By physically interrupting the battery negative feed, the switch prevents parasitic drains, accidental shorts, and unwanted power flow while you’re working on electrical systems. The lock-out handle reduces the chance of unintentional reconnection during service.

• Instantaneous current rating up to 5000A to tolerate short surge events
• Continuous rating of 500A for high-drain systems like winches and inverters
• Lockable handle secures the open position during maintenance
• Corrosion-resistant materials protect internal contacts in wet conditions

Can I install the KACOLA switch myself?

Yes — the unit is designed for straightforward installation with two 10mm threaded studs that accept standard battery cable terminals and nuts. Basic hand tools are typically all you need, and a wiring diagram is shown in the product images to guide placement.

• Two 10mm studs for easy connection of negative battery cables
• Mounts into a panel with a lock-out plate for secure fastening
• Simple on/off operation — no complex wiring required for basic use
• Suitable for 12V to 36V systems used in vehicles and marine craft

What environments and vehicles is this switch suited for?

Manufactured with sealed metal housing and copper conductors, this disconnect switch tolerates humid, marine, and off-road conditions. It’s appropriate for recreational and commercial platforms where reliable high-current switching is required.

• Recommended for RVs, yachts, boats, and marine applications
• Fits trucks, heavy equipment, tractors, and agricultural machinery
• Works with golf carts, cars, and other 12–36V electric systems
• Durable handle and sealing limit corrosion and mechanical wear

Will this switch handle heavy loads like winches or multiple batteries?

Yes — the 500A continuous rating covers most high-demand accessories and multi-battery setups when properly sized and installed. The high instantaneous rating helps the switch survive the inrush currents associated with motors and charging events.

• 500A continuous current rating for demanding accessories
• 5000A instantaneous/surge capacity to absorb brief spikes
• Robust copper contacts to reduce voltage drop under load
• Use appropriate cable gauge and fusing per system requirements

Who is this for? The KACOLA 500A Battery Disconnect Switch is aimed at DIYers, fleet operators, mariners, and RV owners who need a dependable, heavy-duty means to isolate batteries for safety, storage, or service. If you operate high-current accessories, maintain vehicles or boats, or require a secure lock-out for electrical work, this switch provides a rugged, easy-to-install solution that replaces standard 20247-style cut-offs.