Colorful varistors. Circuit board detail. Electronic components for surge protector. Diodes, red, blue and yellow voltage-dependent resistors on green PCB from dismantled uninterruptible power supply. Stock Photo | Adobe Stock
Hager 125A Surge Protection Kit Type 2
1 wire Power injection circuit + Power Surge circuit board
Surge protector - Wikipedia
Surge protection circuit for power supplies | ElecCircuit.com
Best Lightning & Surge Protectors | L-Com | Cat 5e Cat 6, PoE, Coaxial Tagged "circuit-board" - ITM Components