Although the varistor characteristics were simulated using hyperperspice, the transient analysis does not show the characteristic values I expect, and only the DC sweep analysis simulates the correct characteristics. For your information, we simulated a varistor product called S20K275 from TDK. While I-V curves are good for dc sweeps, transient analysis results in incorrect overcurrent flow at low voltages. Also, I would like to ask you to add the varistor model itself to the psim, not the hyperspice. Thank you.
