What happens when a fuse blows?

When a fuse blows, it serves as a protective device that interrupts the flow of current in a circuit by breaking the electrical connection. This occurs when the current exceeds the fuse's rated capacity, causing the metal element within the fuse to melt and open the circuit. As a result, current ceases to flow, effectively preventing potential damage to the electrical components and reducing the risk of fire due to overheating. It is crucial to replace the blown fuse with one of the same rating to restore the protection and allow the circuit to function correctly again. This highlights the fuse's role in overcurrent protection by ensuring that excessive current does not continue to flow, safeguarding both the system and connected devices.