Inter-line application circuitThe characteristic of this circuit is that the varistor R is connected in parallel between the power line incoming line or between the signal line and the ground line. When the voltage across R1 reaches the breakdown voltage, the resistance of R1 is rapidly reduced to a

Under normal circumstances, in the protection circuit, the minimum value of the varistor voltage should meet the requirement of formula (1). In addition, the large value of the varistor voltage should also meet the requirements of formula (2) according to the withstand voltage level of the protectio

Common resistors have varistors, which are commonly used for lightning protection. The failure mode of the varistor is mainly a short circuit. If the short circuit time is too long, it will explode, catch fire, and damage the surrounding components; an open circuit may also occur. There are several

Three: Parallel connection of varistors:When a varistor does not meet the requirements of the nominal discharge current, multiple varistors should be used in parallel. Sometimes, in order to reduce the limiting voltage, multiple varistors are connected in parallel even if the nominal discharge curre

A: The calculation of varistor voltage can generally be calculated by the following formula:U1mA = KUac Where: K is the coefficient related to the power quality, generally K = (2 ~ 3), the city with better power quality is desirable, and the rural area with poor power quality (especially in the moun

The varistor is a non-linear volt-ampere resistance device. Most of the varistors are used for voltage circuit protection when the circuit is under overvoltage, and absorb excess current to protect sensitive devices. Often referred to as VDR. The resistor body of the varistor is a semiconductor, so