Why are USB surge protectors not commonly used or widely available? Is the AC to DC transformer alone sufficient to provide protection from something like a nearby lightning strike? - Quora
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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
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RV Ignition Control Circuit Board,Surge Protection Heater PC Circuit Control Board DC 12V UIB S Ignitor Board for Suburban Water Heaters
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