Uamea oxide Varistor / metala paʻepaʻe oxide varistor o non-laina resistor faʻaaogaina o semiconductor electrocnic elemeni keramika e tele lava ina faia o metala paʻepaʻe oxide. E taʻua ole varistor poʻo le mafaufau oxide varistor (MOV), e pei lava ona maaleale ile suiga ole voltage. O le tino o le varistor o se matrix fausaga fausiaina o zinc oxide fasimea. O le saito tuaoi i le va o fasimea e tutusa ma eletise uiga o bidirectional PN fauga. A o le voltage e maualalo o nei saito tapulaʻa o loʻo i le maualuga impedance tulaga ma pe a maualuga le voltage o le a latou i le breakdown tulaga o se ituaiga o le laina laina.