貼片功率電感，此類貼片電感又稱為功率電感，大電流電感。貼片電感，是閉合回路的一種屬性。當貼片電感的線圈通過電流后，貼片電感在線圈中形成磁場感應，感應磁場又會產生感應電流來抵制通過線圈中的電流。貼片電感在電路中起到的作用是在通過非穩恒電流時產生變化的磁場，而這個磁場又會反過來影響電流，貼片電感在電源回路中串如電感，電感對直流是直通的，對高頻脈沖是高阻的，所以起到通直流阻交流脈沖的作用。

電(dian)(dian)(dian)(dian)(dian)阻(zu)用(yong)來控制(zhi)電(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)的(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，電(dian)(dian)(dian)(dian)(dian)容(rong)用(yong)來隔直(zhi)流(liu)(liu)通交(jiao)流(liu)(liu)， 電(dian)(dian)(dian)(dian)(dian)感(gan)用(yong)來阻(zu)高頻通低頻的(de)，另一方(fang)面電(dian)(dian)(dian)(dian)(dian)容(rong)和電(dian)(dian)(dian)(dian)(dian)感(gan)都是(shi)儲能元件(jian)，所以(yi)在電(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)還(huan)有濾波作(zuo)用(yong)。貼片(pian)電(dian)(dian)(dian)(dian)(dian)感(gan)在電(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)具有阻(zu)止交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)通過(guo)而讓直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)順(shun)利通過(guo)的(de)特性。電(dian)(dian)(dian)(dian)(dian)感(gan)的(de)特性是(shi)通直(zhi)流(liu)(liu)、阻(zu)交(jiao)流(liu)(liu)，頻率越高，線圈(quan)阻(zu)抗越大。所以(yi)電(dian)(dian)(dian)(dian)(dian)感(gan)器在電(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)經(jing)常和電(dian)(dian)(dian)(dian)(dian)容(rong)一起工作(zuo)。

電(dian)感(gan)(gan)線(xian)圈有阻止交流電(dian)路中電(dian)流變化(hua)的(de)(de)(de)特(te)性。電(dian)感(gan)(gan)線(xian)圈有與力學中的(de)(de)(de)慣性相類似的(de)(de)(de)特(te)性，在(zai)(zai)電(dian)學上取名為(wei)"自感(gan)(gan)應"，貼片(pian)電(dian)感(gan)(gan)在(zai)(zai)低頻時，電(dian)感(gan)(gan)一般呈現(xian)電(dian)感(gan)(gan)特(te)性，既只(zhi)起蓄能，濾(lv)高(gao)頻的(de)(de)(de)特(te)性，但在(zai)(zai)高(gao)頻時，它的(de)(de)(de)阻抗特(te)性表現(xian)的(de)(de)(de)很明顯。有耗(hao)能發熱，感(gan)(gan)性效應降低等現(xian)象。不同的(de)(de)(de)電(dian)感(gan)(gan)的(de)(de)(de)高(gao)頻特(te)性都不一樣(yang)。