In what units are aircraft fuse capacities rated?

Aircraft fuse capacities are rated in amperes, which measure the flow of electric current through the fuse. This rating indicates the maximum current that can pass through the fuse before it blows, protecting the circuit from overloads and potential damage. Fuses are designed to interrupt the electrical flow when the current exceeds this amperage limit, ensuring safety and reliability in the electrical systems of the aircraft.

While volts and watts are also important electrical measurements—volts measure the electrical potential and watts quantify power (the product of voltage and current)—they are not the primary ratings for fuses. Fuses specifically focus on the current aspect in amperes to provide an effective safeguard against excessive current draw.