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Circuit Breakers for 4x4, Caravans, and Marine

We stock an extensive range of circuit breakers designed for 4x4, caravans, and marine applications. From manual reset options to waterproof designs, we stock breakers to suit 12V–42V systems.

Browse Outback Equipment for quality and variety in every product.

What is a circuit breaker used for?

A circuit breaker is a safety device that protects your electrical system. It stops electricity if there is an overload or short circuit. Overloads happen when too many devices run on the same circuit, like a toaster, microwave, and kettle. Short circuits occur when damaged wires or faulty appliances create an unsafe current.

Without a circuit breaker, these problems could damage your wiring or equipment. A breaker cuts the power instantly to prevent harm. You can reset it once the issue is fixed and continue using your system safely.

Which type of circuit breaker is right for me?

Choosing the right circuit breaker depends on where and how you'll use it:

  • For vehicles like cars or trucks: A manual reset breaker is ideal. It allows you to inspect wiring or accessories, like auxiliary lights or winches, before restoring power. This ensures you catch faults early.
  • Use a circuit breaker designed for your 12V system and make sure it meets the manufacturer’s specifications. This ensures it works safely with devices like pumps, portable fridges, or air conditioners.

Always match the voltage (12–42V) and the amp rating (e.g., 100A or 300A) to your system.

A higher amp rating is typically better for heavy-duty equipment like winches or inverters. For smaller accessories, a lower rating should be enough. If you have questions about this, you can also call our experts at 1300 854 185.

Do you stock breakers for marine use?

Yes, we stock marine-grade circuit breakers. These are designed to handle tough conditions on boats and marine equipment, including exposure to water. Our range includes waterproof options from trusted brands like Blue Sea Systems and Relaxn, ensuring reliable performance even in the harshest marine environments.

Why is my circuit breaker tripping?

If your breaker is tripping, there could be several reasons:

  1. Overloaded Circuits: Too many devices drawing power at once.

  2. Short Circuits: A fault in wiring or connected appliances.

  3. Ground Faults: This occurs when electricity takes an unintended path to the ground, often due to damaged insulation, worn wiring, or loose connections. In 4x4, marine, and RV environments, this can be caused by vibration, corrosion, or improperly secured electrical components. These faults can disrupt power and cause breakers to trip for safety.

To fix it, unplug devices and reset the breaker. If it keeps tripping, check your wiring or call an electrician. It’s better to solve the cause than risk damage.

What’s the difference between a circuit breaker and a fuse?

Circuit breakers and fuses both protect your electrical system, but they work differently. A circuit breaker stops electricity during a fault and can be reset, making it reusable and convenient for modern setups like vehicles, caravans, and boats.

Fuses, however, are single-use. They "blow" to stop the flow of electricity and need replacing each time. While effective, they’re less practical for frequent faults or systems where quick resets are needed.