Which of the following devices is used for surge protection?

A surge suppressor is specifically designed to protect electrical devices from voltage spikes, commonly known as surges, which can occur due to various reasons, including lightning strikes, power outages, or fluctuations in the electrical grid. When a surge occurs, the surge suppressor diverts excess voltage away from connected devices, preventing damage or degradation over time.

This device works by absorbing or redirecting the surges, typically using components such as metal oxide varistors (MOVs) or gas discharge tubes, which can quickly react to sudden increases in voltage. This functionality is essential in maintaining the longevity and reliability of sensitive electronics and appliances.

In contrast, a fuse is designed to protect against overcurrent situations by breaking the circuit when the current exceeds a certain threshold. A circuit breaker also serves a similar purpose by interrupting the circuit when it detects an overload or short circuit. Lastly, a transformer is used to change voltage levels in electrical systems but does not provide surge protection. Each of these devices plays a critical role in electrical safety and efficiency, but only the surge suppressor is specifically tailored to handle voltage spikes.