Na'urar dumama PTC ita ce hita da aka ƙera don sababbin motocin makamashi.Mai zafi na PTC yana dumama duk abin hawa, yana ba da zafi ga kuk ɗin sabon motar makamashi kuma ya cika ka'idojin tsabtace sanyi da lalata.Mai zafi na PTC kuma yana iya dumama sauran hanyoyin motar da ke buƙatar tsarin zafin jiki (misali baturi).Na'urar dumama ta PTC tana aiki ta hanyar ɗumama daskarewa ta hanyar lantarki ta yadda za'a yi masa zafi a ciki ta wurin jigon iska mai dumi.Ana shigar da injin PTC a cikin tsarin wurare dabam dabam na ruwa mai sanyaya ruwa inda zafin iska mai zafi yana da laushi da sarrafawa.Mai zafi na PTC yana fitar da IGBTs tare da tsarin PWM don daidaita wutar lantarki kuma yana da ɗan gajeren aikin ajiyar zafi.Na'urar dumama ta PTC tana da alaƙa da muhalli kuma tana da ƙarfin kuzari, daidai da dorewar muhalli na zamanin yau.