貼片電感是閉合回路的一種屬性。當貼片電感器的線圈通過電流后，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。電感的特性是通直流、阻交流，頻率越高，線圈阻抗越大。電感器在電路中經常和電容一起工作。電感線圈有阻止交流電路中電流變化的特性。

貼片電感的(de)(de)(de)作(zuo)用:通直流阻交(jiao)流這是簡單的(de)(de)(de)說法，對交(jiao)流信號進行隔(ge)離(li),濾波或與(yu)電(dian)(dian)(dian)容(rong)器(qi)(qi),電(dian)(dian)(dian)阻器(qi)(qi)等組成諧(xie)振電(dian)(dian)(dian)路。調諧(xie)與(yu)選頻電(dian)(dian)(dian)感的(de)(de)(de)作(zuo)用：電(dian)(dian)(dian)感器(qi)(qi)線圈與(yu)電(dian)(dian)(dian)容(rong)器(qi)(qi)并聯(lian)可組成LC調諧(xie)電(dian)(dian)(dian)路。貼(tie)片電(dian)(dian)(dian)感在(zai)電(dian)(dian)(dian)路中的(de)(de)(de)任何(he)電(dian)(dian)(dian)流，會產生磁場，磁場的(de)(de)(de)磁通量又作(zuo)用于電(dian)(dian)(dian)路上。