High Performance Varistor works

Response time and high voltage varistoris ns level, faster than gas discharge tube, slightly slower than the TVS tube, generally used in electronic circuit overvoltage protection to meet the requirements of its response speed. When High Performance Varistor junction capacitance range is generally on the order of hundreds to thousands of Pf, in many cases should not be directly applied in the protection of high-frequency signal line, the application in the protection of the AC circuit, as it greatly increases junction capacitance leakage current protection circuits designed to take full account. High Performance Varistor flow capacity is large, but smaller than the gas discharge tube. High Performance Varistor referred VDR, is a non-linear voltage-sensitive semiconductor element overvoltage protection.
l When applied to the Varistor for counter voltage is below its threshold, the current flowing through it is extremely small, it is equivalent to a resistance infinite resistance. That is, when a voltage is applied on top of it is below its threshold, which is equivalent to an OFF state of the switch.
l When applied to the High Performance Varistor voltage exceeds its threshold, the surge current flowing through it, which is equivalent to the resistance infinitely small resistance. That is, when added on top of it higher than its threshold voltage, which is equivalent to a closed switch.