Waterproof DC Circuit Breakers

High amp thermal trip circuit breakers with a manual reset switch suitable for use on auxiliary DC electrical systems. Ideal for use in environments prone to vibrations such as Caravans, motorhomes etc.

Circuit rating: 30A-300A(Optional)
Voltage rating: 12-48V DC
Interrupt rating: 3000A@30V DC
Operating temperature: -32°C to 82°C
Storage temperature: -34°C - 149°C
Number of Poles: 2
Weatherproof rating: IP67
Color: Black
Housing is thermal plastic UL-rated 94V0

What is a waterproof DC circuit breaker used for?

A waterproof DC circuit breaker is used to protect 12V or 24V electrical systems from overloads and short circuits. It automatically cuts power when a fault occurs, helping prevent damage to wiring, batteries, and connected equipment.

How is a circuit breaker different from a fuse?

Unlike a fuse, which must be replaced after it blows, a circuit breaker can be reset and reused. This makes it more convenient for caravan systems where faults may occasionally occur.

Is this circuit breaker suitable for caravans and RVs?

Yes, waterproof DC circuit breakers are ideal for caravans, motorhomes, boats, and off-grid systems. They are commonly used to protect accessories like inverters, solar setups, and battery systems.

What voltage systems does it support?

Most waterproof DC circuit breakers are designed for 12V to 24V systems, with some models supporting up to 48V DC depending on the specification.

What does “waterproof” mean in this context?

Waterproof circuit breakers are built with sealed housings or protective covers to resist moisture, dust, and harsh outdoor conditions—making them suitable for exposed installations in caravans or marine environments.

How do you reset the breaker after it trips?

Most models feature a manual reset button or switch. After resolving the fault, you simply press or flip the reset mechanism to restore power.

Where should a DC circuit breaker be installed?

It is typically installed inline on the positive cable, close to the battery or power source, to protect the entire circuit from faults.

What amperage ratings are available?

Waterproof DC circuit breakers come in a range of amperages (e.g. 30A, 50A, 100A, 150A, and higher), allowing you to match the breaker to your specific electrical load requirements.

Can it be used as a switch as well?

Yes, many models can double as a power switch, allowing you to manually disconnect power for maintenance or safety purposes.

Is installation difficult?

No, most waterproof DC circuit breakers are designed for simple installation, with inline or surface-mount options that connect directly to your wiring system.