Ukuvikelwa kwe-overvoltage ngezingxenye ngazinye ezine-varistors ekwakhiweni kwe-terminal
Ama-varistors e-metal-oxide angasetshenziswa ekwakhiweni kwe-terminal. Avunyelwe i-voltage yokusebenza ye-sine-wave-form ephezulu kakhulu, ephrintwa engxenyeni. Noma yimaphi ama-voltage amakhulu kune-maxi- evunyelwe
Ama-moms akhishwa ngokuphephile ngaphakathi kwama-ns angu-25. Ama-Varistors asetshenziselwa amandla aphakathi kuya kwaphezulu.