Describe the flow capacity of the varistor

Varistor Voltage As the name implies, the touch voltage is used to limit the threshold voltage. The varistor is often referred to as MY. For example, if J is used for home use, the letters W, L, H, Z, B, C, N, and K at the back are divided into voltage regulator circuits, overvoltage protection, high frequency circuits, and lightning protection. Eliminate noise, compensation, degaussing, high energy or high reliability. Although varistor can absorb a large amount of surge energy, it cannot withstand continuous currents above mA, so be sure to consider this when used as overvoltage protection. The choice of varistor usually selects the nominal flow capacity.

The so-called flow capacity, that is, the value of the pulse width current is the pulse at which the conversion of the varistor voltage does not exceed ± 10% with respect to the delineated large current waveform and the specified number of inrush currents at an ambient temperature of 25 ° C. Width current value. In order to increase the lifetime of the device, the value of the surge current drawn by the zinc oxide varistor should be less than the throughput of the product given in the description. However, in terms of protection results, it is necessary to use a larger flow rate. In many cases, the actual flow rate is difficult to calculate accurately, so it is generally a 2-200 varistor.