Residential Buildings: Surge protective devices are commonly installed in residential buildings to protect sensitive electronics, appliances, and other valuable equipment from power surges. They can be installed at the main electrical panel to provide whole-house protection or at specific points of use, such as near computers, home entertainment systems, or HVAC equipment.

Commercial Buildings: Surge protective devices are crucial in commercial buildings, where a significant amount of electrical equipment is used. They are installed to safeguard office equipment, servers, data centers, communication systems, and other critical infrastructure from power surges that can result from lightning strikes, utility grid disturbances, or switching operations.

Industrial Facilities: Industrial environments are often prone to electrical disturbances due to the presence of heavy machinery, motor starting and stopping, and other industrial processes. Surge protective devices are employed to protect sensitive equipment, control systems, programmable logic controllers (PLCs), and other electronic components from voltage spikes that can cause malfunctions, downtime, or equipment damage.

Solar System (Photovoltaic Power Supply System): Surge protective devices are used to protect against lightning surge voltages which must be installed in parallel on the dc networks to be protected and provide common and different modes protection. Their installed location are recommended at both ends of the dc power supply line (solar panel side and inverter/converter side), especially if the line routing is external and long

Data Centers: Data centers house extensive computer systems, servers, networking equipment, and storage devices. Surge protective devices are employed to safeguard these sensitive and expensive components from power surges that can lead to data loss, system failure, or downtime. They are often installed at various points within the data center's electrical infrastructure to provide multiple layers of protection.

Telecommunications: Surge protective devices play a crucial role in telecommunications infrastructure, protecting communication lines, equipment, and networking systems from transient surges that can disrupt data transmission, damage network switches, or cause communication outages.
Overall, surge protective devices find application in a wide range of settings, including residential, commercial, industrial, healthcare, data centers, and telecommunications, where the protection of electrical and electronic equipment from power surges is essential. The specific placement and configuration of surge protective devices may vary depending on the specific application and the level of protection required for the connected equipment.