滌綸電容特點有哪些

突出優點：薄膜(mo)電(dian)(dian)(dian)容(rong)(rong)的精(jing)度、損耗角、絕緣(yuan)電(dian)(dian)(dian)阻、溫度特性、可靠性及(ji)適應(ying)環境(jing)等(deng)指標(biao)都優于電(dian)(dian)(dian)解電(dian)(dian)(dian)容(rong)(rong)，瓷片電(dian)(dian)(dian)容(rong)(rong)兩種電(dian)(dian)(dian)容(rong)(rong)。

突出缺點(dian)：容量價格比及容量體積比都大(da)于以上兩種電(dian)容。

用(yong)途(tu)：在各種直流或(huo)中低頻脈(mo)動電(dian)路(lu)中使用(yong)。適宜作為旁路(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。

額定電壓范圍(wei)：63-630V。

損(sun)耗角正切：0.3-0.7。

工作溫度：-55℃到125℃。

溫度系數：+200 +600ppm。

常(chang)見分類：跟很多(duo)電(dian)容一樣(yang)，滌綸電(dian)容還有很多(duo)細小的分類，比(bi)如常(chang)見的CL11，CL21；區別在于CL21電(dian)容內壁(bi)采用(yong)金屬化技術，體積較CL11小很多(duo)，但(dan)整體性能不如CL11。因此購(gou)買時需要向商家說(shuo)明，是(shi)買哪一種。

滌綸電容參數識別

1、國外電容器(qi)耐(nai)壓值通常用字(zi)母(mu)來表示基數(shu)，常見(jian)的(de)代碼和基數(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(zi)母前面的數(shu)表示10的冪，比如(ru)2A，即(ji)為102*1.0=100V，2C為102*1.6=160V等(deng)等(deng)。

耐壓(ya)值(zhi)后方的(de)字母表示(shi)電容容量，單(dan)位為pF。

例如：823表示(shi)容(rong)(rong)量為82*10^3=82000Pf ，224表示(shi)22*104=220000pf=0.22μF；最后的(de)字母表示(shi)精度(du)，比如J表示(shi)容(rong)(rong)量允許(xu)偏差為±5%等(deng)等(deng)。

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

2、電容器的參數標注方法

（1） 直標(biao)(biao)法(fa)：將電(dian)容器的(de)主要參數（標(biao)(biao)稱容量、額(e)定電(dian)壓(ya)、及允許偏差）直接標(biao)(biao)注在電(dian)容器上，如0.0047μf/275V，0.0047μf是容量，相當于4700Pf，275V應是耐壓(ya)（不屬優選數系列）。

（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)(shu)字標注法 一般(ban)是(shi)用3位數(shu)(shu)字表示(shi)電容(rong)(rong)器的容(rong)(rong)量。其中(zhong)前(qian)兩(liang)位為有(you)(you)效(xiao)值數(shu)(shu)字，第三位為倍乘(cheng)數(shu)(shu)（即(ji)表示(shi)有(you)(you)效(xiao)值后有(you)(you)多少(shao)個(ge)0）。如104，表示(shi)有(you)(you)效(xiao)值是(shi)10，后面再加4個(ge)0，即(ji)100000Pf=0.1μf。

（3）字(zi)母與數(shu)(shu)字(zi)混(hun)合標注(zhu)法：用(yong)2—4位數(shu)(shu)字(zi)表(biao)示有效值，用(yong)P、n、M、μ、G、m等字(zi)母表(biao)示有效數(shu)(shu)后面的(de)量級(ji)。進(jin)口電容(rong)器在(zai)標注(zhu)數(shu)(shu)值時不用(yong)小數(shu)(shu)點，而是將(jiang)整(zheng)數(shu)(shu)部(bu)(bu)分寫在(zai)字(zi)母之前(qian)，將(jiang)小數(shu)(shu)部(bu)(bu)分寫在(zai)字(zi)母后面。如4P7表(biao)示4．7Pf，3m3表(biao)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(zi)母(mu)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(cha)為±10%。

（資料來源(yuan)《通用電子元器件(jian)的選用與檢測(ce)》）

國產(chan)電容器標(biao)注(zhu)可查閱《GB/T 2691-1994 電阻(zu)器和(he)電容器的標(biao)志代碼。

滌綸電容的作用

滌(di)綸(lun)電(dian)(dian)容是電(dian)(dian)子產品中(zhong)必不可少的(de)一個基(ji)本元件(jian)，在(zai)電(dian)(dian)路中(zhong)充(chong)當著濾(lv)波、振(zhen)蕩、電(dian)(dian)源退(tui)耦、脈動(dong)信號的(de)旁路及耦合等。

滌綸電(dian)(dian)容(rong)的(de)最簡單(dan)結構(gou)可由兩個金(jin)屬(shu)板(ban)(ban)中間(jian)(jian)夾一層絕緣介質組成。在兩個金(jin)屬(shu)板(ban)(ban)（極(ji)板(ban)(ban)）間(jian)(jian)加(jia)一個電(dian)(dian)壓，極(ji)板(ban)(ban)就能儲存(cun)(cun)電(dian)(dian)荷(he)(he)。儲存(cun)(cun)電(dian)(dian)荷(he)(he)的(de)大小與極(ji)板(ban)(ban)間(jian)(jian)電(dian)(dian)壓與極(ji)板(ban)(ban)面積(ji)（容(rong)量）成正比，與極(ji)板(ban)(ban)間(jian)(jian)的(de)距(ju)離成反(fan)比。Q=CV 即(ji)C=Q/V=εS/4πd（《詳見薄膜(mo)電(dian)(dian)容(rong)器理論計算及修正》）Q—極(ji)板(ban)(ban)上(shang)儲存(cun)(cun)的(de)電(dian)(dian)荷(he)(he)；C—電(dian)(dian)容(rong)器（PF）；V—極(ji)板(ban)(ban)間(jian)(jian)的(de)電(dian)(dian)壓（V）； ε——介質介電(dian)(dian)常數（聚酯膜(mo)為3.0，聚丙烯膜(mo)2.1）； S—金(jin)屬(shu)極(ji)板(ban)(ban)面積(ji)(mm2)； d—極(ji)板(ban)(ban)間(jian)(jian)的(de)距(ju)離(mm)。

滌綸電容的種類

1、按其可調節性分

可分為(wei)固定(ding)電(dian)容(rong)器、微調電(dian)容(rong)器、可變電(dian)容(rong)器三種。

2、按介質分

有(you)(you)氣體(ti)(ti)(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)、無(wu)機(ji)固體(ti)(ti)(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)、有(you)(you)機(ji)固體(ti)(ti)(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)、電(dian)(dian)(dian)(dian)(dian)解介(jie)(jie)(jie)質(zhi)(zhi)、液(ye)體(ti)(ti)(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)及(ji)(ji)復合(he)(he)介(jie)(jie)(jie)質(zhi)(zhi)等電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)。 其中： 氣體(ti)(ti)(ti)(ti)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)包(bao)(bao)括(kuo)(kuo)(kuo)空氣、真空、充氣式電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)；無(wu)機(ji)固體(ti)(ti)(ti)(ti)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)包(bao)(bao)括(kuo)(kuo)(kuo)云母、陶(tao)瓷(ci)及(ji)(ji)玻璃(li)釉電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)；有(you)(you)機(ji)固體(ti)(ti)(ti)(ti)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)包(bao)(bao)括(kuo)(kuo)(kuo)有(you)(you)機(ji)薄膜及(ji)(ji)紙介(jie)(jie)(jie)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)；電(dian)(dian)(dian)(dian)(dian)解介(jie)(jie)(jie)質(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)包(bao)(bao)括(kuo)(kuo)(kuo)鋁電(dian)(dian)(dian)(dian)(dian)解、鈮電(dian)(dian)(dian)(dian)(dian)解及(ji)(ji)鉭電(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)；液(ye)體(ti)(ti)(ti)(ti)介(jie)(jie)(jie)質(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)包(bao)(bao)括(kuo)(kuo)(kuo)各(ge)種有(you)(you)機(ji)油質(zhi)(zhi)及(ji)(ji)液(ye)體(ti)(ti)(ti)(ti)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)； 復合(he)(he)介(jie)(jie)(jie)質(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)包(bao)(bao)括(kuo)(kuo)(kuo)有(you)(you)機(ji)固體(ti)(ti)(ti)(ti)復合(he)(he)、無(wu)機(ji)固體(ti)(ti)(ti)(ti)復合(he)(he)、有(you)(you)機(ji)固體(ti)(ti)(ti)(ti)與無(wu)機(ji)固體(ti)(ti)(ti)(ti)復合(he)(he)制做的電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)(qi)。

3、在市(shi)場(chang)應(ying)用中主要(yao)是三(san)大類(lei)電容(rong)(rong)器(qi)(qi)：瓷片電容(rong)(rong)器(qi)(qi)、薄膜電容(rong)(rong)器(qi)(qi)、電解電容(rong)(rong)器(qi)(qi)。這三(san)大類(lei)電容(rong)(rong)器(qi)(qi)占市(shi)場(chang)量的(de)99%以上。