Surge protection devices (SPDs) are electrical devices designed to protect electrical equipment from voltage spikes or surges. These surges can occur due to lightning strikes, power outages, or sudden changes in electricity usage. SPDs work by diverting excess voltage away from sensitive equipment, helping to prevent damage. SPDs are commonly used in homes and businesses to safeguard devices like computers, televisions, and appliances. They come in various forms, including plug-in units and hardwired systems. By using surge protection devices, individuals can extend the lifespan of their electronics and reduce the risk of costly repairs or replacements.