Which device is designed to protect appliances from power surges?

A surge protector is specifically engineered to safeguard appliances and electronic devices from the damaging effects of power surges. Power surges can occur due to various reasons, such as lightning strikes, power outages, or fluctuations in the electrical supply. When a surge occurs, the surge protector diverts excess voltage away from connected devices, preventing potential damage.

Surge protectors typically contain components like metal-oxide varistors (MOVs) that absorb and redirect the excess voltage to the ground, ensuring that the connected appliances receive a stable voltage level. This function is crucial for preserving the longevity and functionality of sensitive electronics like computers, televisions, and other appliances.

In contrast, while other devices like fuses and circuit breakers serve to stop electrical overloads by breaking the circuit when the current exceeds safe levels, they do not specifically target voltage spikes and surges. A Ground Fault Circuit Interrupter (GFCI) is designed to cut off the electrical supply in the event of a ground fault, primarily for protecting against electric shock rather than protecting against surges. Thus, the surge protector is the ideal choice for the express purpose of protecting appliances from power surges.