• Thermal Breaker: This device protects your electrical equipment from damage caused by overloads and short circuits. It operates by sensing excessive heat generated by high current flow and automatically trips to open the circuit.
• Differential Breaker (RCD): An RCD is a critical safety device that protects people from electric shock and prevents fires caused by current leakage. It works by detecting an imbalance in current and is typically used in AC (alternating current) systems.

To choose the correct thermal breaker size, you need to determine the maximum continuous amperage of the electrical device you want to protect. The breaker's amperage rating should be slightly higher than the device's normal operating current to prevent nuisance tripping, but low enough to protect the circuit from damage.

Key Principle: The thermal breaker should be sized to protect the weakest link in the circuit, which is usually the smallest gauge wire.

Recommendation: A good rule of thumb is to choose a breaker that is about 15-20% larger than the expected continuous current draw of the device.

To check if your thermal breaker is working correctly, you can use the built-in features of your model.

1. Check the LED: Your thermal breaker is equipped with an integrated LED. When the breaker is triggered due to an overload or short circuit, the LED will light up, visually confirming that the circuit is open. If the breaker trips and the LED does not light up, this indicates a power issue on the input side of the breaker.
2. Verify Power Supply: If the LED does not light up after a trip, check your battery switch to ensure it is on and verify that the battery is properly connected to the breaker's input. The breaker requires power to illuminate the LED, so an unlit LED can be a simple diagnostic for power loss.

A thermal breaker should always be installed on the positive (+) signal of the circuit you want to protect. The most effective placement is as close as possible to the power source (e.g., the battery) to safeguard the entire length of the cable running to the device.

For example:

• For an Inverter: Place the breaker on the positive cable directly before the inverter's input terminal.
• For a Windlass: If the cable runs across the boat, install the breaker close to the battery to protect the entire cable run from any potential fault.

The Ignition Protect ISO 8846 certification is a crucial safety standard for any electrical component installed in an enclosed space where gasoline vapors might be present, such as an engine compartment. This certification guarantees that the product will not generate a spark or heat that could ignite flammable gases, thus significantly reducing the risk of fire or explosion on board.