Ultimate Guide to Electronic Components & Circuit Design (2025 Update)
Components AnalysisExplore our 3 main knowledge domains:
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Causes of damage to varistor and protection methods
Varistor is a resistor device. Its main feature is that within the normal operating voltage range, its resistance value is very high and it is almost non-conductive. However, when overvoltage occurs in the circuit (such as sudden voltage increase caused by lightning strike or equipment failure), the resistance value of the varistor will drop sharply, making it have the protection function of eliminating overvoltage.
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