The performance of the varistor is related to the quality

Pressure sensitive resistance is measured in zinc oxide as the main component of nonlinear resistance element, the element of surge current tolerance and nonlinear coefficient is very large, below the threshold voltage, the resistance is very high, almost no current flows through, if more than the threshold voltage, resistance is reduced sharply, can enlarge leakage current, due to this feature, as the protection of the electrical and electronic equipment components, to absorb abnormal voltage, lightning surge of absorption plays a big role.

Piezoresistive resistance is usually used in parallel in the circuit. When the voltage of both ends of the resistance changes sharply, the resistance short circuit will fuse the current fuse and play a protective role. Pressure-sensitive resistors are often used in circuits for overvoltage protection and voltage stabilization. Due to the large parasitic capacitance of the piezoresistive, it will generate considerable leakage current when used in ac power supply system. After using the piezoresistive for a period of time, the high leakage current may cause thermal burst.