滌綸電容特點有哪些

突出優(you)點：薄(bo)膜電(dian)容的(de)精度、損耗角、絕緣電(dian)阻、溫度特性、可靠性及適應環境等指標都優(you)于電(dian)解電(dian)容，瓷片電(dian)容兩(liang)種(zhong)電(dian)容。

突出缺點(dian)：容量價格比及容量體(ti)積比都大于(yu)以上兩(liang)種(zhong)電容。

用(yong)途(tu)：在各(ge)種直流或中低(di)頻脈動電路(lu)中使(shi)用(yong)。適(shi)宜作為旁路(lu)電容使(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(ding)電(dian)壓范圍：63-630V。

損耗角(jiao)正切(qie)：0.3-0.7。

工作溫度：-55℃到125℃。

溫度系數：+200 +600ppm。

常見分類：跟很多電容一(yi)樣，滌綸電容還有很多細小(xiao)的分類，比如(ru)常見的CL11，CL21；區(qu)別在于CL21電容內壁采用金屬化技(ji)術，體積較(jiao)CL11小(xiao)很多，但整(zheng)體性(xing)能不如(ru)CL11。因此購買(mai)時需(xu)要向商家說明(ming)，是買(mai)哪一(yi)種。

滌綸電容參數識別

1、國(guo)外電容器耐(nai)壓值(zhi)通常用字母來表示基(ji)數，常見的代碼和基(ji)數對應(ying)關系(xi)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(qian)面的數(shu)表示10的冪(mi)，比如2A，即為102*1.0=100V，2C為102*1.6=160V等(deng)等(deng)。

耐壓值后方的(de)字母表示電容(rong)容(rong)量，單(dan)位為pF。

例如：823表(biao)示容量為82*10^3=82000Pf ，224表(biao)示22*104=220000pf=0.22μF；最后的字母表(biao)示精度，比如J表(biao)示容量允許偏差(cha)為±5%等等。

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） 直標法(fa)：將電(dian)容(rong)(rong)器(qi)的主要參數（標稱容(rong)(rong)量、額定電(dian)壓、及允(yun)許(xu)偏差）直接標注在電(dian)容(rong)(rong)器(qi)上，如0.0047μf/275V，0.0047μf是容(rong)(rong)量，相當于4700Pf，275V應是耐壓（不屬優(you)選數系列(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. 數字標注法 一般是(shi)用3位(wei)數字表示電(dian)容(rong)(rong)器(qi)的容(rong)(rong)量。其中(zhong)前兩位(wei)為有(you)效(xiao)(xiao)值(zhi)數字，第三位(wei)為倍乘數（即表示有(you)效(xiao)(xiao)值(zhi)后有(you)多少個0）。如104，表示有(you)效(xiao)(xiao)值(zhi)是(shi)10，后面再加(jia)4個0，即100000Pf=0.1μf。

（3）字母與(yu)數(shu)字混合(he)標注法：用(yong)2—4位數(shu)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(shu)后面(mian)的量級。進口電容(rong)器在標注數(shu)值時(shi)不用(yong)小數(shu)點，而是將整數(shu)部分寫在字母之前，將小數(shu)部分寫在字母后面(mian)。如(ru)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）字母含義：

F ±1%

G ±2%

J ±5%

K ±10%

M ±20%

N ±30%

如104K表示容量100000Pf=0.1μf，容量允許偏差為±10%。

（資料(liao)來源《通用電子元器件(jian)的選(xuan)用與(yu)檢測(ce)》）

國(guo)產(chan)電容(rong)器(qi)標注(zhu)可(ke)查閱《GB/T 2691-1994 電阻器(qi)和電容(rong)器(qi)的標志代碼。

滌綸電容的作用

滌綸電容是電子產品(pin)中(zhong)必不可少的一個基本元件，在電路中(zhong)充當著濾波(bo)、振蕩、電源退耦(ou)、脈動信號的旁路及耦(ou)合(he)等。

滌綸電(dian)容(rong)的(de)(de)最(zui)簡單結構可由兩(liang)個金(jin)屬(shu)板(ban)(ban)(ban)(ban)中間(jian)夾(jia)一(yi)層絕緣介質(zhi)組成(cheng)。在兩(liang)個金(jin)屬(shu)板(ban)(ban)(ban)(ban)（極(ji)(ji)板(ban)(ban)(ban)(ban)）間(jian)加一(yi)個電(dian)壓(ya)，極(ji)(ji)板(ban)(ban)(ban)(ban)就能儲存(cun)電(dian)荷(he)(he)。儲存(cun)電(dian)荷(he)(he)的(de)(de)大小(xiao)與(yu)極(ji)(ji)板(ban)(ban)(ban)(ban)間(jian)電(dian)壓(ya)與(yu)極(ji)(ji)板(ban)(ban)(ban)(ban)面積（容(rong)量）成(cheng)正比(bi)，與(yu)極(ji)(ji)板(ban)(ban)(ban)(ban)間(jian)的(de)(de)距(ju)離(li)成(cheng)反比(bi)。Q=CV 即C=Q/V=εS/4πd（《詳見薄膜電(dian)容(rong)器理(li)論計算及修正》）Q—極(ji)(ji)板(ban)(ban)(ban)(ban)上儲存(cun)的(de)(de)電(dian)荷(he)(he)；C—電(dian)容(rong)器（PF）；V—極(ji)(ji)板(ban)(ban)(ban)(ban)間(jian)的(de)(de)電(dian)壓(ya)（V）； ε——介質(zhi)介電(dian)常數（聚酯膜為3.0，聚丙烯膜2.1）； S—金(jin)屬(shu)極(ji)(ji)板(ban)(ban)(ban)(ban)面積(mm2)； d—極(ji)(ji)板(ban)(ban)(ban)(ban)間(jian)的(de)(de)距(ju)離(li)(mm)。

滌綸電容的種類

1、按其可調節性分

可(ke)分為固定電(dian)容器(qi)、微調(diao)電(dian)容器(qi)、可(ke)變電(dian)容器(qi)三種。

2、按介質分

有(you)(you)(you)氣體介(jie)(jie)質(zhi)(zhi)(zhi)、無(wu)(wu)機(ji)(ji)固(gu)(gu)體介(jie)(jie)質(zhi)(zhi)(zhi)、有(you)(you)(you)機(ji)(ji)固(gu)(gu)體介(jie)(jie)質(zhi)(zhi)(zhi)、電(dian)(dian)(dian)(dian)解(jie)(jie)(jie)介(jie)(jie)質(zhi)(zhi)(zhi)、液體介(jie)(jie)質(zhi)(zhi)(zhi)及復合(he)介(jie)(jie)質(zhi)(zhi)(zhi)等電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)。 其中： 氣體電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)空(kong)氣、真空(kong)、充氣式(shi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)；無(wu)(wu)機(ji)(ji)固(gu)(gu)體電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)云母、陶瓷及玻璃(li)釉電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)；有(you)(you)(you)機(ji)(ji)固(gu)(gu)體電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)有(you)(you)(you)機(ji)(ji)薄膜(mo)及紙介(jie)(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)；電(dian)(dian)(dian)(dian)解(jie)(jie)(jie)介(jie)(jie)質(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)鋁電(dian)(dian)(dian)(dian)解(jie)(jie)(jie)、鈮電(dian)(dian)(dian)(dian)解(jie)(jie)(jie)及鉭(tan)電(dian)(dian)(dian)(dian)解(jie)(jie)(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)；液體介(jie)(jie)質(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)各種有(you)(you)(you)機(ji)(ji)油(you)質(zhi)(zhi)(zhi)及液體電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)； 復合(he)介(jie)(jie)質(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括(kuo)有(you)(you)(you)機(ji)(ji)固(gu)(gu)體復合(he)、無(wu)(wu)機(ji)(ji)固(gu)(gu)體復合(he)、有(you)(you)(you)機(ji)(ji)固(gu)(gu)體與無(wu)(wu)機(ji)(ji)固(gu)(gu)體復合(he)制做的電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)。

3、在市場應用中主要是(shi)三大類電(dian)容器(qi)(qi)：瓷片電(dian)容器(qi)(qi)、薄膜電(dian)容器(qi)(qi)、電(dian)解電(dian)容器(qi)(qi)。這三大類電(dian)容器(qi)(qi)占(zhan)市場量的99%以上。