Fuse

Definition

A fuse is an overcurrent protection device that prevents excessive current from flowing in an electrical circuit by melting and breaking the circuit when the current exceeds a specific value.

Purpose

The purpose of a fuse is to protect electrical circuits and devices from damage caused by overcurrent, such as short circuits or overloads, by interrupting the flow of electricity when necessary.

Examples of Use

• Household electrical panels use fuses to protect wiring and appliances from electrical faults.
• Automotive electrical systems incorporate fuses to prevent damage to vehicle electronics and wiring.

Related Terms

• Circuit Breaker: A switch that automatically interrupts electrical flow in a circuit in case of an overload or short circuit.
• Overload Protection: Devices or mechanisms that protect electrical circuits from carrying too much current.
• Short Circuit: An electrical fault where current flows along an unintended path, often resulting in excessive current.

Notes

Fuses need to be replaced after they blow, whereas circuit breakers can be reset. Choosing the correct fuse rating for the specific circuit is essential for effective protection.