滌綸電容特點有哪些

突出優(you)點(dian)：薄(bo)膜(mo)電容(rong)的精度、損(sun)耗角、絕緣(yuan)電阻(zu)、溫度特性(xing)、可靠性(xing)及適應環境(jing)等指標都優(you)于(yu)電解電容(rong)，瓷片電容(rong)兩種電容(rong)。

突出缺點(dian)：容(rong)量價(jia)格(ge)比及容(rong)量體(ti)積比都大于以(yi)上兩種電容(rong)。

用途：在各種直流或中低頻脈動電路中使用。適宜作為旁路電容(rong)使用。

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(wei)：470pF~4.7μF。

額(e)定電壓范圍(wei)：63-630V。

損耗角正切：0.3-0.7。

工作溫度：-55℃到125℃。

溫度系(xi)數：+200 +600ppm。

常見分(fen)類：跟很多電(dian)(dian)容一樣，滌綸電(dian)(dian)容還有很多細小的分(fen)類，比如(ru)常見的CL11，CL21；區(qu)別在(zai)于CL21電(dian)(dian)容內壁采用(yong)金屬化技術，體積較(jiao)CL11小很多，但整體性能(neng)不如(ru)CL11。因此購買時需要向商家說明，是買哪一種(zhong)。

滌綸電容參數識別

1、國外電(dian)容(rong)器(qi)耐(nai)壓(ya)值通常用字母來表(biao)示(shi)基數(shu)(shu)，常見的代碼和基數(shu)(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(mu)前面的(de)(de)數表示(shi)10的(de)(de)冪，比如2A，即為(wei)102*1.0=100V，2C為(wei)102*1.6=160V等(deng)等(deng)。

耐壓值后方的字母(mu)表示電容容量，單(dan)位為pF。

例(li)如：823表(biao)示(shi)容(rong)量為82*10^3=82000Pf ，224表(biao)示(shi)22*104=220000pf=0.22μF；最后的字母表(biao)示(shi)精度(du)，比如J表(biao)示(shi)容(rong)量允(yun)許偏差為±5%等等。

典型的電容標識(shi)示例：2A823J 即82000Pf±5%，耐壓100V。

2、電容器的參數標注方法

（1） 直標(biao)法：將電容(rong)器(qi)的主要參(can)數(shu)（標(biao)稱容(rong)量、額定(ding)電壓、及允許偏(pian)差）直接標(biao)注在電容(rong)器(qi)上，如0.0047μf/275V，0.0047μf是容(rong)量，相當于4700Pf，275V應是耐(nai)壓（不屬優選數(shu)系列(lie)）。

（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)字(zi)標注法 一般是(shi)(shi)用3位數(shu)字(zi)表(biao)示(shi)電容(rong)器的容(rong)量(liang)。其中(zhong)前兩位為有效值數(shu)字(zi)，第(di)三位為倍乘數(shu)（即(ji)表(biao)示(shi)有效值后有多少個(ge)0）。如104，表(biao)示(shi)有效值是(shi)(shi)10，后面再加4個(ge)0，即(ji)100000Pf=0.1μf。

（3）字母與(yu)數字混(hun)合標(biao)注法：用(yong)2—4位數字表示有(you)效(xiao)值，用(yong)P、n、M、μ、G、m等(deng)字母表示有(you)效(xiao)數后(hou)面的量級。進口電容器在(zai)標(biao)注數值時不用(yong)小(xiao)(xiao)數點，而是(shi)將整數部分寫(xie)在(zai)字母之(zhi)前，將小(xiao)(xiao)數部分寫(xie)在(zai)字母后(hou)面。如4P7表示4．7Pf，3m3表示3300μf(3.3mf)等(deng)。

3、電容器的容量的允許偏差標注字母及含義

（1）字(zi)母(mu)含義：

F ±1%

G ±2%

J ±5%

K ±10%

M ±20%

N ±30%

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

（資料來源(yuan)《通(tong)用電(dian)子元器件(jian)的選用與檢測》）

國產電(dian)容器(qi)標注可查閱《GB/T 2691-1994 電(dian)阻器(qi)和電(dian)容器(qi)的標志代碼(ma)。

滌綸電容的作用

滌綸(lun)電(dian)(dian)容(rong)是電(dian)(dian)子產品中必不可(ke)少的(de)一個(ge)基(ji)本元件，在電(dian)(dian)路中充當(dang)著濾波(bo)、振蕩(dang)、電(dian)(dian)源退(tui)耦、脈(mo)動信號的(de)旁路及(ji)耦合等。

滌綸電(dian)(dian)(dian)(dian)(dian)容的(de)(de)最簡單結構可由兩個(ge)(ge)金屬板(ban)中間(jian)(jian)夾一層絕緣介質組成(cheng)。在兩個(ge)(ge)金屬板(ban)（極(ji)(ji)板(ban)）間(jian)(jian)加一個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)壓(ya)，極(ji)(ji)板(ban)就能儲(chu)存電(dian)(dian)(dian)(dian)(dian)荷。儲(chu)存電(dian)(dian)(dian)(dian)(dian)荷的(de)(de)大小(xiao)與(yu)極(ji)(ji)板(ban)間(jian)(jian)電(dian)(dian)(dian)(dian)(dian)壓(ya)與(yu)極(ji)(ji)板(ban)面積(ji)（容量）成(cheng)正比(bi)，與(yu)極(ji)(ji)板(ban)間(jian)(jian)的(de)(de)距離成(cheng)反(fan)比(bi)。Q=CV 即(ji)C=Q/V=εS/4πd（《詳見薄膜(mo)(mo)電(dian)(dian)(dian)(dian)(dian)容器理(li)論計算及(ji)修正》）Q—極(ji)(ji)板(ban)上儲(chu)存的(de)(de)電(dian)(dian)(dian)(dian)(dian)荷；C—電(dian)(dian)(dian)(dian)(dian)容器（PF）；V—極(ji)(ji)板(ban)間(jian)(jian)的(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)（V）； ε——介質介電(dian)(dian)(dian)(dian)(dian)常(chang)數（聚(ju)酯膜(mo)(mo)為3.0，聚(ju)丙烯膜(mo)(mo)2.1）； S—金屬極(ji)(ji)板(ban)面積(ji)(mm2)； d—極(ji)(ji)板(ban)間(jian)(jian)的(de)(de)距離(mm)。

滌綸電容的種類

1、按其可調節性分

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

2、按介質分

有氣(qi)體(ti)(ti)(ti)介(jie)(jie)質(zhi)(zhi)、無(wu)機(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)(ti)介(jie)(jie)質(zhi)(zhi)、有機(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)(ti)介(jie)(jie)質(zhi)(zhi)、電(dian)(dian)(dian)(dian)解介(jie)(jie)質(zhi)(zhi)、液體(ti)(ti)(ti)介(jie)(jie)質(zhi)(zhi)及(ji)復合(he)(he)(he)介(jie)(jie)質(zhi)(zhi)等(deng)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)。 其中： 氣(qi)體(ti)(ti)(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)包(bao)括(kuo)(kuo)空氣(qi)、真(zhen)空、充氣(qi)式電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)；無(wu)機(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)包(bao)括(kuo)(kuo)云母(mu)、陶瓷及(ji)玻璃釉電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)；有機(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)包(bao)括(kuo)(kuo)有機(ji)(ji)(ji)薄膜及(ji)紙介(jie)(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)；電(dian)(dian)(dian)(dian)解介(jie)(jie)質(zhi)(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)包(bao)括(kuo)(kuo)鋁電(dian)(dian)(dian)(dian)解、鈮電(dian)(dian)(dian)(dian)解及(ji)鉭電(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)；液體(ti)(ti)(ti)介(jie)(jie)質(zhi)(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)包(bao)括(kuo)(kuo)各(ge)種有機(ji)(ji)(ji)油質(zhi)(zhi)及(ji)液體(ti)(ti)(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)； 復合(he)(he)(he)介(jie)(jie)質(zhi)(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)包(bao)括(kuo)(kuo)有機(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)(ti)復合(he)(he)(he)、無(wu)機(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)(ti)復合(he)(he)(he)、有機(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)(ti)與無(wu)機(ji)(ji)(ji)固(gu)(gu)體(ti)(ti)(ti)復合(he)(he)(he)制做(zuo)的電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)。

3、在市場應用中(zhong)主要是三(san)大類(lei)電(dian)(dian)(dian)容器(qi)(qi)：瓷(ci)片電(dian)(dian)(dian)容器(qi)(qi)、薄(bo)膜(mo)電(dian)(dian)(dian)容器(qi)(qi)、電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容器(qi)(qi)。這三(san)大類(lei)電(dian)(dian)(dian)容器(qi)(qi)占市場量的99%以上。