滌綸電容特點有哪些

突(tu)出優點(dian)：薄膜電(dian)(dian)容(rong)(rong)的精度、損耗(hao)角、絕緣電(dian)(dian)阻(zu)、溫度特性、可靠性及適應環境等指標都優于電(dian)(dian)解電(dian)(dian)容(rong)(rong)，瓷片電(dian)(dian)容(rong)(rong)兩(liang)種(zhong)電(dian)(dian)容(rong)(rong)。

突(tu)出缺點：容(rong)(rong)量價格比及(ji)容(rong)(rong)量體積比都大于以上兩種電容(rong)(rong)。

用(yong)途：在各(ge)種(zhong)直流或中低頻(pin)脈動電路中使(shi)(shi)用(yong)。適宜作為旁路電容使(shi)(shi)用(yong)。

該圖片由注冊用戶"妮子的文字"提供，版權聲明反饋

容值范圍：470pF~4.7μF。

額定電壓范圍：63-630V。

損耗角正切(qie)：0.3-0.7。

工作溫(wen)度：-55℃到125℃。

溫(wen)度系數：+200 +600ppm。

常(chang)見(jian)分類(lei)：跟很(hen)多電(dian)容一(yi)樣，滌綸電(dian)容還有(you)很(hen)多細小(xiao)(xiao)的(de)分類(lei)，比如常(chang)見(jian)的(de)CL11，CL21；區別在(zai)于(yu)CL21電(dian)容內壁采用金屬(shu)化技(ji)術(shu)，體積較CL11小(xiao)(xiao)很(hen)多，但整體性能不如CL11。因此(ci)購買(mai)時需(xu)要(yao)向商(shang)家說明，是(shi)買(mai)哪(na)一(yi)種。

滌綸電容參數識別

1、國外電容器耐壓值通常用字母來(lai)表示基(ji)數(shu)，常見的代碼和(he)基(ji)數(shu)對應關系是：

A：1.0；B：1.25；C：1.6；D：2.0；E：2.5；F：3.15；G4.0；

H：5.0；J：6.3；K：8.0；Z：9.0；

字母前面的數(shu)表示10的冪，比如2A，即為(wei)102*1.0=100V，2C為(wei)102*1.6=160V等等。

耐壓值(zhi)后(hou)方的字母表示電(dian)容(rong)容(rong)量，單位(wei)為pF。

例(li)如：823表示容(rong)量為82*10^3=82000Pf ，224表示22*104=220000pf=0.22μF；最(zui)后的字母表示精度，比如J表示容(rong)量允許(xu)偏差為±5%等(deng)(deng)等(deng)(deng)。

典型的電容標識示例：2A823J 即82000Pf±5%，耐壓100V。

2、電容器的參數標注方法

（1） 直標(biao)(biao)法：將電(dian)容(rong)(rong)器的主要參數(shu)（標(biao)(biao)稱容(rong)(rong)量、額定電(dian)壓(ya)(ya)、及允(yun)許偏(pian)差）直接標(biao)(biao)注在電(dian)容(rong)(rong)器上，如0.0047μf/275V，0.0047μf是容(rong)(rong)量，相(xiang)當于4700Pf，275V應是耐壓(ya)(ya)（不屬優選數(shu)系列）。

（2） 文字符號法：采用數字或字母與數字混合的方法來標注電容器的主要參數。
1. 數(shu)(shu)字(zi)標注法 一(yi)般是用(yong)3位數(shu)(shu)字(zi)表(biao)示(shi)電容器的容量(liang)。其中前兩(liang)位為有效值(zhi)數(shu)(shu)字(zi)，第三位為倍乘數(shu)(shu)（即(ji)表(biao)示(shi)有效值(zhi)后(hou)有多少個(ge)0）。如104，表(biao)示(shi)有效值(zhi)是10，后(hou)面再加4個(ge)0，即(ji)100000Pf=0.1μf。

（3）字母(mu)與數(shu)(shu)字混合標注法：用2—4位(wei)數(shu)(shu)字表(biao)示(shi)有(you)效(xiao)值，用P、n、M、μ、G、m等字母(mu)表(biao)示(shi)有(you)效(xiao)數(shu)(shu)后面的量級(ji)。進口電(dian)容器在(zai)標注數(shu)(shu)值時不用小(xiao)數(shu)(shu)點，而是(shi)將整數(shu)(shu)部分寫在(zai)字母(mu)之前，將小(xiao)數(shu)(shu)部分寫在(zai)字母(mu)后面。如4P7表(biao)示(shi)4．7Pf，3m3表(biao)示(shi)3300μf(3.3mf)等。

3、電容器的容量的允許偏差標注字母及含義

（1）字母含義：

F ±1%

G ±2%

J ±5%

K ±10%

M ±20%

N ±30%

如104K表示容(rong)量100000Pf=0.1μf，容(rong)量允許偏差為(wei)±10%。

（資(zi)料來源《通用電子(zi)元器(qi)件(jian)的選用與檢測》）

國(guo)產(chan)電(dian)容(rong)器標(biao)(biao)注可查閱《GB/T 2691-1994 電(dian)阻器和電(dian)容(rong)器的標(biao)(biao)志代碼。

滌綸電容的作用

滌綸(lun)電(dian)容是電(dian)子產品中(zhong)(zhong)必不可少的一個基本元件，在(zai)電(dian)路中(zhong)(zhong)充當著濾波、振蕩、電(dian)源退(tui)耦、脈動信號(hao)的旁路及耦合等。

滌綸電(dian)(dian)容的最(zui)簡單結構可由兩個金(jin)屬板(ban)(ban)中間(jian)(jian)(jian)夾一層絕緣介質組成。在兩個金(jin)屬板(ban)(ban)（極(ji)(ji)板(ban)(ban)）間(jian)(jian)(jian)加一個電(dian)(dian)壓(ya)，極(ji)(ji)板(ban)(ban)就能儲存(cun)電(dian)(dian)荷。儲存(cun)電(dian)(dian)荷的大小與極(ji)(ji)板(ban)(ban)間(jian)(jian)(jian)電(dian)(dian)壓(ya)與極(ji)(ji)板(ban)(ban)面積（容量(liang)）成正比，與極(ji)(ji)板(ban)(ban)間(jian)(jian)(jian)的距(ju)離成反比。Q=CV 即C=Q/V=εS/4πd（《詳見薄膜(mo)電(dian)(dian)容器(qi)理(li)論計算及修正》）Q—極(ji)(ji)板(ban)(ban)上儲存(cun)的電(dian)(dian)荷；C—電(dian)(dian)容器(qi)（PF）；V—極(ji)(ji)板(ban)(ban)間(jian)(jian)(jian)的電(dian)(dian)壓(ya)（V）； ε——介質介電(dian)(dian)常數（聚(ju)(ju)酯膜(mo)為3.0，聚(ju)(ju)丙(bing)烯膜(mo)2.1）； S—金(jin)屬極(ji)(ji)板(ban)(ban)面積(mm2)； d—極(ji)(ji)板(ban)(ban)間(jian)(jian)(jian)的距(ju)離(mm)。

滌綸電容的種類

1、按其可調節性分

可分(fen)為固(gu)定電容(rong)器(qi)、微調電容(rong)器(qi)、可變(bian)電容(rong)器(qi)三種。

2、按介質分

有氣(qi)體(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)(zhi)(zhi)、無(wu)(wu)機(ji)(ji)(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)(zhi)(zhi)、有機(ji)(ji)(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)(zhi)(zhi)、電(dian)(dian)(dian)(dian)解(jie)介(jie)(jie)(jie)質(zhi)(zhi)(zhi)(zhi)、液體(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)(zhi)(zhi)及(ji)復(fu)(fu)(fu)合介(jie)(jie)(jie)質(zhi)(zhi)(zhi)(zhi)等電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)。 其(qi)中： 氣(qi)體(ti)(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)包括(kuo)空氣(qi)、真(zhen)空、充氣(qi)式(shi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)；無(wu)(wu)機(ji)(ji)(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)包括(kuo)云母、陶瓷及(ji)玻璃釉電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)；有機(ji)(ji)(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)包括(kuo)有機(ji)(ji)(ji)(ji)(ji)薄膜及(ji)紙介(jie)(jie)(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)；電(dian)(dian)(dian)(dian)解(jie)介(jie)(jie)(jie)質(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)包括(kuo)鋁電(dian)(dian)(dian)(dian)解(jie)、鈮電(dian)(dian)(dian)(dian)解(jie)及(ji)鉭電(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)；液體(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)包括(kuo)各種有機(ji)(ji)(ji)(ji)(ji)油質(zhi)(zhi)(zhi)(zhi)及(ji)液體(ti)(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)； 復(fu)(fu)(fu)合介(jie)(jie)(jie)質(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)包括(kuo)有機(ji)(ji)(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)復(fu)(fu)(fu)合、無(wu)(wu)機(ji)(ji)(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)復(fu)(fu)(fu)合、有機(ji)(ji)(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)與(yu)無(wu)(wu)機(ji)(ji)(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)復(fu)(fu)(fu)合制做的電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)。

3、在市場應用中主要是三(san)大類電容器：瓷片電容器、薄膜電容器、電解電容器。這三(san)大類電容器占(zhan)市場量的99%以上。