Surge Protection Devices (SPDs) are electrical devices designed to protect electrical equipment from voltage spikes or surges. These surges can occur due to various reasons, such as lightning strikes, power outages, or sudden changes in electricity demand. SPDs work by diverting excess voltage away from sensitive equipment, ensuring that it operates safely and efficiently. SPDs are commonly used in homes, offices, and industrial settings to safeguard devices like computers, televisions, and machinery. They come in various forms, including plug-in units and hardwired systems, and are essential for maintaining the longevity and reliability of electrical systems and appliances.