Fuses and circuit breakers carry a rating that tells what they protect against. In which unit is that rating given?

1. Fuses and circuit breakers are rated in amperes, the SI unit of current. 2. They open the circuit when a sustained current exceeds safe limits, so current is the quantity that matters. 3. Many electrical appliances carry ampere ratings as well. 4. Volts measure the supply and watts measure power, but the device trips on the current flowing through it, not on either of those. _Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section 20.1 Current_