Txij li thaum nws cov kev taw qhia nyob rau hauv 1971, lub rhuab semiconductor core tau coj raws li qhov sib txawv ntawm qhov kub thiab txias resistor reverses tus qauv ntawm high / low heating kub, raws li lub tshav kub kab hluav taws xob sib txawv nrog rau qhov kub ntawm ntau qhov chaw ntawm hluav taws xob tshav kub kab. Kev txwv cov hluav taws xob hluav taws xob rau tus kheej tau dhau los ua hom hluav taws xob hluav taws xob ntau tshaj plaws hauv ntiaj teb niaj hnub no. Lawv tuaj yeem siv dav hauv kev thauj mus los ntawm cov khoom ua kua hauv cov kav dej thiab lub tank antifreeze rwb thaiv tsev, kev saib xyuas cov txheej txheem kub, cua sov ntawm txoj kev, ramps, neeg taug kev hla, eaves thiab pem teb. Nyob nruab nrab ntawm ob lub cores ntawm tus kheej-limiting hluav taws xob kab, ib qho khoom siv hluav taws xob semiconductor polymer uas ua lub luag haujlwm cua sov, thiab nws sab nrauv yog tsim los ntawm cov ntaub ntawv polymer sab hauv, cov hlau nplaum tiv thaiv mesh thiab cov ntaub ntawv polymer txheej. Thaum ib qho tam sim no dhau mus, cov kab hluav taws xob kuj nce siab thaum qhov kub ntawm cov kab hluav taws xob nce ntxiv. Yog li ntawd, qhov tso zis hluav taws xob ntawm cov hluav taws xob cable txo qis thaum nws qhov kub thiab txias nce. Txij li thaum tshav kub kab hluav taws xob sib txawv nrog qhov kub ntawm txhua qhov chaw ntawm cov kab hluav taws xob, cov rhuab semiconductor core tshwm raws li qhov ntsuas kub tsis sib xws uas yog qhov sib txawv ntawm qhov kub siab / qis cua sov sib txawv. Self-limiting hluav taws xob cov kab hluav taws xob thaum tshav kub kub tsis overheat txawm tias overlapping. Yog tsis muaj kev tsim tshwj xeeb, tus kheej-txheej hluav taws xob taug qab tuaj yeem txiav nws txoj haujlwm ntev ntawm qhov chaw kom raug raws li qhov tseeb qhov ntev ntawm cov yeeb nkab, tsis muaj cov cuab yeej tshwj xeeb, thiab nws yooj yim heev rau nruab.
