為(wei)了保障電源適(shi)配(pei)器(qi)的(de)工作(zuo)安全，工程師需要在(zai)電路設計(ji)上實現最(zui)優化效果，并保障線路系(xi)統(tong)能(neng)夠(gou)長時(shi)間高效安全運轉。因此，壓(ya)敏電阻器(qi)作(zuo)為一種能(neng)夠(gou)對電路實現電壓(ya)抑制保護的(de)元件(jian)，便在(zai)日(ri)常設計(ji)過程中得(de)到了充分的(de)運用。

對于(yu)從事過(guo)電(dian)(dian)源設(she)(she)計(ji)或適配器設(she)(she)計(ji)行業的工程師(shi)來說(shuo)，壓(ya)敏電(dian)(dian)阻(zu)器是(shi)一(yi)個比較熟悉的名詞(ci)了(le)。這(zhe)款電(dian)(dian)阻(zu)器是(shi)工作(zuo)中比較常(chang)用(yong)的一(yi)種電(dian)(dian)子元(yuan)器件，它具有瞬(shun)態電(dian)(dian)壓(ya)抑(yi)制功(gong)能，在(zai)設(she)(she)計(ji)中一(yi)般會被用(yong)于(yu)適配器的電(dian)(dian)路浪涌和瞬(shun)變防護(hu)電(dian)(dian)路方面。在(zai)正常(chang)工作(zuo)的情況下，壓(ya)敏電(dian)(dian)阻(zu)器能夠對集(ji)成(cheng)(cheng)電(dian)(dian)路等(deng)重(zhong)要(yao)元(yuan)件以及其他電(dian)(dian)路和設(she)(she)備進行保護(hu)，防止因靜(jing)電(dian)(dian)放電(dian)(dian)、浪涌及其他瞬(shun)態電(dian)(dian)流-如(ru)夏(xia)季雷(lei)(lei)擊、雷(lei)(lei)暴(bao)等(deng)，而造成(cheng)(cheng)對它們(men)的損壞(huai)。

在(zai)適配器的電(dian)(dian)(dian)路設(she)計過程中，一(yi)般(ban)情況下是可以(yi)直接將壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)器并(bing)接于(yu)被保(bao)護的電(dian)(dian)(dian)路上的。在(zai)完成并(bing)接后(hou)，當(dang)電(dian)(dian)(dian)路系統的電(dian)(dian)(dian)壓(ya)(ya)瞬(shun)間高(gao)于(yu)限定數值時，電(dian)(dian)(dian)阻(zu)(zu)器阻(zu)(zu)值將會迅速下降(jiang)，快速導通大電(dian)(dian)(dian)流，阻(zu)(zu)止瞬(shun)間過壓(ya)(ya)而起到保(bao)護作(zuo)用。當(dang)輸入電(dian)(dian)(dian)壓(ya)(ya)低于(yu)電(dian)(dian)(dian)阻(zu)(zu)器的工作(zuo)電(dian)(dian)(dian)壓(ya)(ya)時，壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)器阻(zu)(zu)值極高(gao)，近乎開路，所(suo)以(yi)不會影(ying)響器件或(huo)電(dian)(dian)(dian)氣(qi)設(she)備(bei)的正常(chang)工作(zuo)

接(jie)入了壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)器的(de)電(dian)(dian)(dian)(dian)(dian)源適配器，其(qi)工作過(guo)(guo)程中(zhong)(zhong)所產生(sheng)的(de)火華電(dian)(dian)(dian)(dian)(dian)路(lu)和(he)沖(chong)擊電(dian)(dian)(dian)(dian)(dian)流(liu)將會(hui)被有(you)效(xiao)的(de)抵(di)消。在(zai)供電(dian)(dian)(dian)(dian)(dian)網絡疊加有(you)過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)脈沖(chong)時，接(jie)壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)后，過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)峰(feng)值波(bo)形(xing)削(xue)平(ping)，限制(zhi)在(zai)一定的(de)幅度內。在(zai)供電(dian)(dian)(dian)(dian)(dian)網絡疊加有(you)過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)脈沖(chong)時，接(jie)壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)后，過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)峰(feng)值波(bo)形(xing)削(xue)平(ping)，限制(zhi)在(zai)一定的(de)幅度內。在(zai)開(kai)啟或關(guan)閉帶有(you)感性、容性的(de)負載電(dian)(dian)(dian)(dian)(dian)路(lu)時，直流(liu)波(bo)形(xing)出現開(kai)關(guan)尖脈沖(chong)，壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)在(zai)電(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)能(neng)吸收這種反電(dian)(dian)(dian)(dian)(dian)功(gong)勢(shi)，從而(er)有(you)效(xiao)的(de)保護開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)路(lu)不受損害(hai)。

電(dian)源適配器在電(dian)路系統設計階(jie)段，可(ke)以利用壓敏電(dian)阻器巧妙(miao)完成電(dian)路保護工作，這種(zhong)電(dian)阻器本身所具有的耐沖擊電(dian)流、電(dian)阻溫度系數小(xiao)(xiao)、體積(ji)小(xiao)(xiao)等優(you)勢，能夠在集(ji)成小(xiao)(xiao)型封裝要求的前提下，幫助適配器安全穩定工作。