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       鋁質電解電容的(de)額定電壓(ya)在選(xuan)型(xing)中有(you)哪(na)些(xie)要點(dian)？鋁(lv)質電解電容(rong)(rong)本體上標有(you)的(de)容(rong)(rong)量和耐壓(ya)，這兩個(ge)參數是(shi)很重(zhong)要，是(shi)選(xuan)用(yong)(yong)電容(rong)(rong)最(zui)基本的(de)內容(rong)(rong)。在實際電容(rong)(rong)選(xuan)型(xing)中，對電流變(bian)化節奏快的(de)地方要用(yong)(yong)容(rong)(rong)量較大的(de)電容(rong)(rong)，但并(bing)非容(rong)(rong)量越大越好，首先，容(rong)(rong)量增大，成本和體積可能會上升，另(ling)外，電容(rong)(rong)越大充電電流就越大，充電時(shi)間也會越長。這些(xie)都是(shi)實際應用(yong)(yong)選(xuan)型(xing)中要考(kao)慮(lv)的(de)。

       額定工(gong)(gong)作(zuo)(zuo)(zuo)電(dian)(dian)(dian)壓：在(zai)規定的(de)(de)工(gong)(gong)作(zuo)(zuo)(zuo)溫(wen)度范(fan)圍內(nei)，電(dian)(dian)(dian)容長(chang)期可靠地工(gong)(gong)作(zuo)(zuo)(zuo)，它能承受的(de)(de)最(zui)大直流(liu)電(dian)(dian)(dian)壓。在(zai)交流(liu)電(dian)(dian)(dian)路中(zhong)(zhong)，要注意所加的(de)(de)交流(liu)電(dian)(dian)(dian)壓最(zui)大值不(bu)能超(chao)過電(dian)(dian)(dian)容的(de)(de)直流(liu)工(gong)(gong)作(zuo)(zuo)(zuo)電(dian)(dian)(dian)壓值。常用(yong)的(de)(de)固定電(dian)(dian)(dian)容工(gong)(gong)作(zuo)(zuo)(zuo)電(dian)(dian)(dian)壓有6.3V、10V、16V、25V、50V、63V、100V、200V、250V、400V、450V、475V、500V、600V、630V。電(dian)(dian)(dian)容在(zai)電(dian)(dian)(dian)路中(zhong)(zhong)實際要承受的(de)(de)電(dian)(dian)(dian)壓不(bu)能超(chao)過它的(de)(de)耐壓值。

       在濾波電路(lu)中，電容的耐壓(ya)(ya)值(zhi)不要(yao)小于交流(liu)有效值(zhi)的1.42倍。另外還(huan)要(yao)注意的一個問題是工作(zuo)電壓(ya)(ya)裕量(liang)，一般來說要(yao)在15%以上。

       讓電容器的(de)額定(ding)電壓具有較(jiao)多的(de)余裕，能降(jiang)低(di)內阻、降(jiang)低(di)漏電流、降(jiang)低(di)損(sun)失角(jiao)、增(zeng)加壽命。雖(sui)然說， 48V的(de)工作電壓使(shi)用(yong)50V的(de)鋁(lv)質電解電容短時間不(bu)會出(chu)現問(wen)題，但使(shi)用(yong)久了，壽命就有可能降(jiang)低(di)。