滌綸電容特點有哪些

突出優(you)點：薄膜電(dian)(dian)容(rong)的精度、損耗角、絕(jue)緣電(dian)(dian)阻、溫度特性、可靠(kao)性及適應環(huan)境等(deng)指標(biao)都(dou)優(you)于電(dian)(dian)解電(dian)(dian)容(rong)，瓷片電(dian)(dian)容(rong)兩種電(dian)(dian)容(rong)。

突出缺點：容量價(jia)格比及(ji)容量體積(ji)比都大于(yu)以(yi)上兩種電容。

用途(tu)：在(zai)各種直流或中低頻脈動電路中使用。適(shi)宜作為(wei)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(fan)圍：470pF~4.7μF。

額定電壓范圍：63-630V。

損(sun)耗角正切：0.3-0.7。

工(gong)作溫度：-55℃到125℃。

溫度系數：+200 +600ppm。

常(chang)見(jian)分(fen)類：跟很多(duo)(duo)(duo)電(dian)(dian)容(rong)一(yi)樣，滌綸電(dian)(dian)容(rong)還有很多(duo)(duo)(duo)細小的分(fen)類，比如(ru)(ru)常(chang)見(jian)的CL11，CL21；區別在(zai)于CL21電(dian)(dian)容(rong)內壁采用金屬化(hua)技術，體積較CL11小很多(duo)(duo)(duo)，但整(zheng)體性能不如(ru)(ru)CL11。因此購買時需要向商家(jia)說明，是買哪一(yi)種(zhong)。

滌綸電容參數識別

1、國外電容器耐壓值通常用字母來(lai)表示基數，常見(jian)的代(dai)碼和(he)基數對應關系是(shi)：

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

耐(nai)壓值后(hou)方的字母表(biao)示電(dian)容容量，單(dan)位為pF。

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

典型的電(dian)容標(biao)識示(shi)例：2A823J 即82000Pf±5%，耐壓(ya)100V。

2、電容器的參數標注方法

（1） 直(zhi)標法：將電(dian)容(rong)(rong)器的主要參數（標稱容(rong)(rong)量、額定電(dian)壓(ya)、及允許(xu)偏差）直(zhi)接標注在(zai)電(dian)容(rong)(rong)器上，如(ru)0.0047μf/275V，0.0047μf是容(rong)(rong)量，相當于4700Pf，275V應是耐壓(ya)（不屬優(you)選(xuan)數系列）。

（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)字(zi)標注法 一般是(shi)用3位數(shu)字(zi)表示(shi)電(dian)容器的容量。其中(zhong)前兩位為有效(xiao)值數(shu)字(zi)，第三位為倍乘數(shu)（即表示(shi)有效(xiao)值后有多少(shao)個0）。如104，表示(shi)有效(xiao)值是(shi)10，后面再加4個0，即100000Pf=0.1μf。

（3）字(zi)母(mu)與數(shu)字(zi)混合標(biao)注法：用(yong)2—4位數(shu)字(zi)表(biao)(biao)示有(you)(you)效值，用(yong)P、n、M、μ、G、m等(deng)字(zi)母(mu)表(biao)(biao)示有(you)(you)效數(shu)后面(mian)的量級。進口(kou)電容器在(zai)標(biao)注數(shu)值時(shi)不用(yong)小數(shu)點，而(er)是將整數(shu)部(bu)分寫(xie)在(zai)字(zi)母(mu)之(zhi)前，將小數(shu)部(bu)分寫(xie)在(zai)字(zi)母(mu)后面(mian)。如4P7表(biao)(biao)示4．7Pf，3m3表(biao)(biao)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(xu)偏差為(wei)±10%。

（資(zi)料(liao)來源《通用(yong)電子(zi)元器(qi)件(jian)的選(xuan)用(yong)與檢測》）

國產電容器標注可查閱《GB/T 2691-1994 電阻(zu)器和電容器的標志代碼。

滌綸電容的作用

滌(di)綸電容是電子產品(pin)中(zhong)必不可少的(de)一個基本元件，在電路(lu)中(zhong)充當(dang)著(zhu)濾波(bo)、振蕩(dang)、電源退耦(ou)、脈動信號(hao)的(de)旁路(lu)及耦(ou)合等(deng)。

滌(di)綸電(dian)(dian)(dian)容(rong)的(de)最簡單結構可(ke)由兩個金(jin)屬板(ban)(ban)(ban)(ban)中間夾一層絕緣介(jie)質組(zu)成(cheng)(cheng)。在兩個金(jin)屬板(ban)(ban)(ban)(ban)（極(ji)(ji)(ji)板(ban)(ban)(ban)(ban)）間加一個電(dian)(dian)(dian)壓(ya)(ya)，極(ji)(ji)(ji)板(ban)(ban)(ban)(ban)就能儲存電(dian)(dian)(dian)荷。儲存電(dian)(dian)(dian)荷的(de)大小(xiao)與極(ji)(ji)(ji)板(ban)(ban)(ban)(ban)間電(dian)(dian)(dian)壓(ya)(ya)與極(ji)(ji)(ji)板(ban)(ban)(ban)(ban)面積（容(rong)量）成(cheng)(cheng)正(zheng)比，與極(ji)(ji)(ji)板(ban)(ban)(ban)(ban)間的(de)距離(li)成(cheng)(cheng)反比。Q=CV 即C=Q/V=εS/4πd（《詳見(jian)薄膜(mo)(mo)電(dian)(dian)(dian)容(rong)器理(li)論計(ji)算及修正(zheng)》）Q—極(ji)(ji)(ji)板(ban)(ban)(ban)(ban)上儲存的(de)電(dian)(dian)(dian)荷；C—電(dian)(dian)(dian)容(rong)器（PF）；V—極(ji)(ji)(ji)板(ban)(ban)(ban)(ban)間的(de)電(dian)(dian)(dian)壓(ya)(ya)（V）； ε——介(jie)質介(jie)電(dian)(dian)(dian)常數（聚酯膜(mo)(mo)為3.0，聚丙烯膜(mo)(mo)2.1）； S—金(jin)屬極(ji)(ji)(ji)板(ban)(ban)(ban)(ban)面積(mm2)； d—極(ji)(ji)(ji)板(ban)(ban)(ban)(ban)間的(de)距離(li)(mm)。

滌綸電容的種類

1、按其可調節性分

可分為(wei)固(gu)定電容器(qi)(qi)(qi)、微調電容器(qi)(qi)(qi)、可變電容器(qi)(qi)(qi)三種。

2、按介質分

有(you)氣(qi)體(ti)(ti)介(jie)質(zhi)、無機(ji)固(gu)(gu)體(ti)(ti)介(jie)質(zhi)、有(you)機(ji)固(gu)(gu)體(ti)(ti)介(jie)質(zhi)、電(dian)(dian)(dian)解介(jie)質(zhi)、液體(ti)(ti)介(jie)質(zhi)及(ji)(ji)復合介(jie)質(zhi)等電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)。 其中： 氣(qi)體(ti)(ti)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括空(kong)(kong)氣(qi)、真(zhen)空(kong)(kong)、充氣(qi)式電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)；無機(ji)固(gu)(gu)體(ti)(ti)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括云母、陶瓷及(ji)(ji)玻璃釉電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)；有(you)機(ji)固(gu)(gu)體(ti)(ti)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括有(you)機(ji)薄(bo)膜及(ji)(ji)紙介(jie)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)；電(dian)(dian)(dian)解介(jie)質(zhi)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括鋁電(dian)(dian)(dian)解、鈮(ni)電(dian)(dian)(dian)解及(ji)(ji)鉭電(dian)(dian)(dian)解電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)；液體(ti)(ti)介(jie)質(zhi)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括各種有(you)機(ji)油質(zhi)及(ji)(ji)液體(ti)(ti)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)； 復合介(jie)質(zhi)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)包(bao)括有(you)機(ji)固(gu)(gu)體(ti)(ti)復合、無機(ji)固(gu)(gu)體(ti)(ti)復合、有(you)機(ji)固(gu)(gu)體(ti)(ti)與無機(ji)固(gu)(gu)體(ti)(ti)復合制做(zuo)的電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)。

3、在市(shi)場應用(yong)中(zhong)主要(yao)是三(san)大類電(dian)容(rong)器(qi)(qi)(qi)(qi)：瓷片電(dian)容(rong)器(qi)(qi)(qi)(qi)、薄膜電(dian)容(rong)器(qi)(qi)(qi)(qi)、電(dian)解電(dian)容(rong)器(qi)(qi)(qi)(qi)。這三(san)大類電(dian)容(rong)器(qi)(qi)(qi)(qi)占市(shi)場量的99%以(yi)上。