滌綸電容特點有哪些

突出優(you)(you)點：薄(bo)膜(mo)電容的精度、損耗角、絕緣電阻、溫度特性、可(ke)靠性及適應環(huan)境等指標(biao)都優(you)(you)于電解電容，瓷(ci)片電容兩種(zhong)電容。

突(tu)出缺點：容(rong)量(liang)價格比(bi)及容(rong)量(liang)體積(ji)比(bi)都(dou)大于以上兩種電容(rong)。

用(yong)途：在各種直流或中(zhong)低頻脈動電(dian)路(lu)(lu)中(zhong)使用(yong)。適宜作為旁(pang)路(lu)(lu)電(dian)容使用(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(ding)電壓范圍(wei)：63-630V。

損耗角正切：0.3-0.7。

工(gong)作溫度：-55℃到125℃。

溫(wen)度系數：+200 +600ppm。

常見(jian)分(fen)類：跟很(hen)(hen)多(duo)電(dian)容一(yi)樣，滌綸電(dian)容還有很(hen)(hen)多(duo)細小的(de)分(fen)類，比(bi)如常見(jian)的(de)CL11，CL21；區(qu)別在于(yu)CL21電(dian)容內壁(bi)采用(yong)金(jin)屬化技術，體積較CL11小很(hen)(hen)多(duo)，但整體性能(neng)不如CL11。因(yin)此購買時需要向(xiang)商家說明，是買哪(na)一(yi)種。

滌綸電容參數識別

1、國(guo)外電容(rong)器耐壓值通(tong)常(chang)用(yong)字母來表示基數，常(chang)見的代碼(ma)和基數對應(ying)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(de)數表示10的(de)冪，比如(ru)2A，即為102*1.0=100V，2C為102*1.6=160V等等。

耐壓值后方的字(zi)母表示電容容量，單位為pF。

例如(ru)：823表示容(rong)(rong)量(liang)為82*10^3=82000Pf ，224表示22*104=220000pf=0.22μF；最后(hou)的(de)字(zi)母表示精度，比如(ru)J表示容(rong)(rong)量(liang)允許偏差為±5%等等。

典型的電(dian)容標識示例：2A823J 即(ji)82000Pf±5%，耐(nai)壓100V。

2、電容器的參數標注方法

（1） 直標(biao)法：將電(dian)(dian)容(rong)器(qi)的主(zhu)要參(can)數(shu)（標(biao)稱容(rong)量(liang)、額定電(dian)(dian)壓、及允許偏差）直接(jie)標(biao)注在電(dian)(dian)容(rong)器(qi)上(shang)，如0.0047μf/275V，0.0047μf是(shi)容(rong)量(liang)，相當于4700Pf，275V應是(shi)耐(nai)壓（不屬優選數(shu)系(xi)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. 數字標(biao)注法 一般是用3位(wei)(wei)數字表示(shi)電容器的容量。其中前兩位(wei)(wei)為有(you)效(xiao)值數字，第三位(wei)(wei)為倍乘(cheng)數（即表示(shi)有(you)效(xiao)值后有(you)多少(shao)個(ge)0）。如104，表示(shi)有(you)效(xiao)值是10，后面再加4個(ge)0，即100000Pf=0.1μf。

（3）字(zi)母(mu)與數(shu)字(zi)混合標注法(fa)：用2—4位(wei)數(shu)字(zi)表示有效值，用P、n、M、μ、G、m等字(zi)母(mu)表示有效數(shu)后面的量(liang)級。進口電容器在(zai)(zai)標注數(shu)值時(shi)不用小(xiao)(xiao)數(shu)點，而是將(jiang)整數(shu)部分寫(xie)在(zai)(zai)字(zi)母(mu)之前(qian)，將(jiang)小(xiao)(xiao)數(shu)部分寫(xie)在(zai)(zai)字(zi)母(mu)后面。如4P7表示4．7Pf，3m3表示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(mu)含義(yi)：

F ±1%

G ±2%

J ±5%

K ±10%

M ±20%

N ±30%

如104K表示容量100000Pf=0.1μf，容量允(yun)許偏差為±10%。

（資料(liao)來源《通用(yong)電子(zi)元器件的選用(yong)與檢測》）

國產(chan)電(dian)容器(qi)標(biao)注可查閱《GB/T 2691-1994 電(dian)阻器(qi)和電(dian)容器(qi)的標(biao)志代碼。

滌綸電容的作用

滌(di)綸電(dian)(dian)容是(shi)電(dian)(dian)子產(chan)品中(zhong)(zhong)必不可(ke)少(shao)的一個基本(ben)元件，在電(dian)(dian)路中(zhong)(zhong)充(chong)當著(zhu)濾波、振蕩、電(dian)(dian)源退(tui)耦(ou)、脈動信號的旁路及耦(ou)合等。

滌綸(lun)電(dian)容的(de)最簡(jian)單結構(gou)可(ke)由(you)兩(liang)個金(jin)(jin)屬(shu)(shu)板(ban)(ban)(ban)中間夾一層絕緣介質組(zu)成(cheng)。在兩(liang)個金(jin)(jin)屬(shu)(shu)板(ban)(ban)(ban)（極(ji)板(ban)(ban)(ban)）間加一個電(dian)壓(ya)，極(ji)板(ban)(ban)(ban)就能儲(chu)存(cun)電(dian)荷。儲(chu)存(cun)電(dian)荷的(de)大(da)小與(yu)極(ji)板(ban)(ban)(ban)間電(dian)壓(ya)與(yu)極(ji)板(ban)(ban)(ban)面積(ji)（容量(liang)）成(cheng)正比(bi)，與(yu)極(ji)板(ban)(ban)(ban)間的(de)距(ju)離成(cheng)反比(bi)。Q=CV 即C=Q/V=εS/4πd（《詳見薄膜電(dian)容器理論計算(suan)及修正》）Q—極(ji)板(ban)(ban)(ban)上儲(chu)存(cun)的(de)電(dian)荷；C—電(dian)容器（PF）；V—極(ji)板(ban)(ban)(ban)間的(de)電(dian)壓(ya)（V）； ε——介質介電(dian)常(chang)數（聚酯膜為3.0，聚丙烯膜2.1）； S—金(jin)(jin)屬(shu)(shu)極(ji)板(ban)(ban)(ban)面積(ji)(mm2)； d—極(ji)板(ban)(ban)(ban)間的(de)距(ju)離(mm)。

滌綸電容的種類

1、按其可調節性分

可分為固定電容器、微調電容器、可變電容器三(san)種(zhong)。

2、按介質分

有(you)(you)氣體(ti)(ti)介(jie)(jie)質(zhi)、無機(ji)固(gu)體(ti)(ti)介(jie)(jie)質(zhi)、有(you)(you)機(ji)固(gu)體(ti)(ti)介(jie)(jie)質(zhi)、電(dian)(dian)(dian)(dian)(dian)(dian)解介(jie)(jie)質(zhi)、液體(ti)(ti)介(jie)(jie)質(zhi)及(ji)復(fu)合(he)介(jie)(jie)質(zhi)等電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)。 其(qi)中： 氣體(ti)(ti)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)空氣、真空、充氣式電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)；無機(ji)固(gu)體(ti)(ti)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)云母、陶瓷(ci)及(ji)玻璃(li)釉電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)；有(you)(you)機(ji)固(gu)體(ti)(ti)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)有(you)(you)機(ji)薄膜及(ji)紙介(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)；電(dian)(dian)(dian)(dian)(dian)(dian)解介(jie)(jie)質(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)鋁電(dian)(dian)(dian)(dian)(dian)(dian)解、鈮電(dian)(dian)(dian)(dian)(dian)(dian)解及(ji)鉭電(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)；液體(ti)(ti)介(jie)(jie)質(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)各種(zhong)有(you)(you)機(ji)油(you)質(zhi)及(ji)液體(ti)(ti)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)； 復(fu)合(he)介(jie)(jie)質(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)有(you)(you)機(ji)固(gu)體(ti)(ti)復(fu)合(he)、無機(ji)固(gu)體(ti)(ti)復(fu)合(he)、有(you)(you)機(ji)固(gu)體(ti)(ti)與無機(ji)固(gu)體(ti)(ti)復(fu)合(he)制做的(de)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)。

3、在市場應用中主要(yao)是(shi)三大類電(dian)容器(qi)(qi)(qi)：瓷片電(dian)容器(qi)(qi)(qi)、薄(bo)膜電(dian)容器(qi)(qi)(qi)、電(dian)解電(dian)容器(qi)(qi)(qi)。這三大類電(dian)容器(qi)(qi)(qi)占市場量(liang)的99%以上。