Hamolar 300A Manual Reset Circuit Breaker 3-Pack — 12–48V Inline Fuse Holder with Wire Lugs

Hamolar 3 Pack 300A manual-reset circuit breakers protect 12–48V car and marine audio systems by stopping overloads and allowing quick push-button resets.

These compact, inline breaker units act as reusable fuse holders designed for automotive, marine, and RV power systems. Rated for 300 amps and compatible across 12V to 48V DC setups, each breaker uses a push-button manual reset that doubles as a kill switch. Included wire lugs and copper washers simplify installation, while the rugged operating range suits harsh environments from cold starts to hot engine bays.

How does this breaker safeguard my amplifier and battery?

The breaker interrupts excessive current before wiring or equipment overheats, reducing the chance of damage to amplifiers, motors, and batteries. Unlike single-use fuses, it can be reset after a fault is corrected, saving replacement parts and downtime.

• 300A overload protection for high-demand audio and power accessories
• Manual push-button reset instead of replacing fuses
• Helps prevent battery damage and thermal risks from short circuits
• Compatible with 12V through 48V DC systems

Where can I install these in my vehicle or boat?

Install the breaker inline with the positive power feed to the device you want to protect — for example, between the battery and amplifier, winch, or trolling motor. Installation is straightforward with the provided wire lugs and copper washers, and the compact body fits tight engine compartments and distributed audio racks.

• Suitable for car/boat audio systems and marine amplifiers
• Works with RVs, trucks, buses, ATVs, and winches
• Inline placement on positive power leads for direct protection
• Durable in temperatures from -32°C to 82°C (-25°F to 180°F)

What are the electrical and physical specs I need to know?

Each Hamolar breaker is rated for continuous 12–48V DC systems and interrupts faults up to 300 amps. The temperature tolerance and included mounting hardware mean you can use them in enclosed compartments and exposed installations without extra parts.

• Current rating: 300 amps per breaker
• Voltage compatibility: 12V to 48V DC systems
• Operating temperature: -32°C to 82°C (-25°F to 180°F)
• Includes wire lugs and copper washers for secure termination

How easy is troubleshooting and reset after a trip or fault?

The visible push-button allows instant status checks and manual resets without tools. If the breaker trips, isolate the cause, clear the short or overload, and press the button to restore power — making it practical for field repairs on boats and remote vehicles.

• Visible and accessible push-button for quick resets
• Acts as a handy kill switch when needed
• Reusable design reduces ongoing maintenance cost
• Simple wiring reduces diagnostic complexity

Who is this for: The Hamolar 3 Pack 300A manual reset breakers are targeted at DIY installers, car audio enthusiasts, boat owners, and fleet technicians who need reliable, serviceable overload protection. Choose this set if you want high-current protection that’s reusable, easy to mount, and fits a wide range of 12–48V DC systems — from marine amps to RV power setups.