SURGE PROTECTION CIRCUIT PRINCIPLE AND DESIGN | ElectronicsBeliever
China Type 1 3 Phase AC Power Supply Surge Protector SPD 15ka Class B+C Lightning Protection Arrester Surge Protection Device 4p - China 3 Phase SPD, Surge Protective Device
2P DC Surge Protector SPD 20KA 40KA DC 12V 24V 48V 60V 70V 110V 220V Power Supply Surge Protective Device Surge Arrester|Circuit Breakers| - AliExpress
5V power supply with overvoltage protection.
Mains Linear Power Supply Protection - Electrical Engineering Stack Exchange
Surge Protection Devices are used for electric power supply networks