Ampper Battery Disconnect Switch 12–48V On/Off Master Cutoff — 275A Continuous, Rugged Marine/RV/Car Isolator

This compact, rugged switch is built to isolate a vehicle or boat battery quickly and securely. Housed in impact-resistant ABS with an insulated rear cover, it protects terminals from accidental shorts and includes copper studs, mounting hardware and heat-shrink tubing for a straightforward installation. Rated for high continuous and momentary currents, it’s suitable for a wide range of mobile and marine electrical setups.

How does this switch protect my battery when a vehicle is stored?

Switching to the Off position severs the connection between your battery and the electrical system so parasitic draws from alarms, stereos, sensors or control modules are prevented. That means a parked car, stored RV or moored boat won’t slowly discharge and leave you with a dead battery when you return.

• Two-position On/Off operation for simple manual control.
• Prevents parasitic drain from accessories and electronics.
• Helps preserve battery life during long storage periods.
• Easy to turn to ensure quick isolation before transport or maintenance.

What electrical loads and voltages can the Ampper switch handle?

The Ampper switch supports DC systems from 12V up to 48V and is specified for heavy duty current protection. It carries 275 A continuous at 12V, 455 A intermittent, and can tolerate 1250 A momentary surges—adequate for most starter, trolling motor and high-current accessory circuits found in vehicles and small vessels.

• Compatible with DC 12–48V installations.
• 275 A continuous / 455 A intermittent / 1250 A momentary ratings.
• Copper 3/8" terminal studs with nuts and washers for secure connections.
• Rear insulated cover reduces risk of accidental shorts and corrosion points.

How simple is installation and what comes in the kit?

The switch is designed for straightforward mounting and wiring by DIYers or technicians. The package includes all basic hardware and small accessories so you can mount the unit, attach heavy-gauge cables, and protect the connections with heat-shrink before returning the cover.

• Complete kit: switch, 4 sets of mounting bolts, 4 copper lugs, wrench and 4 heat-shrink tubes.
• Four mounting holes for secure panel or deck installation.
• Compact 2.68" x 2.68" x 3.07" footprint fits tight spaces in engine bays and compartments.
• Can be used alone or mechanically linked with other switches for multi-battery setups.

Will this switch fit my car, RV or boat electrical system safely?

Yes—its universal design works with automotive, recreation vehicle and marine DC systems when properly sized. The robust ABS housing and insulated rear cover improve safety in damp or vibration-prone environments, while the heavy copper studs handle common starter and accessory currents.

• Universal application: cars, trucks, RVs, boats and electrical equipment.
• Insulated housing helps reduce risk in marine or moist conditions.
• 3/8" terminal stud size matches common battery cable lug fittings.
• Durable construction intended for frequent On/Off use.

Who is this for: The Ampper Battery Disconnect Switch is for boat owners, RV enthusiasts, fleet operators and DIY mechanics who need a reliable, easy-to-install battery master cutoff. Choose this switch when you want a compact, high-current rated isolator to prevent battery drain, simplify maintenance, and add a straightforward safety shutoff to 12–48V electrical systems.