滌綸電容特點有哪些

突出(chu)優點：薄(bo)膜(mo)電容的精度、損耗角(jiao)、絕緣(yuan)電阻、溫度特性、可靠性及適應環境等指標都(dou)優于電解(jie)電容，瓷片電容兩(liang)種電容。

突出缺點(dian)：容量(liang)(liang)價(jia)格比及容量(liang)(liang)體積比都大于(yu)以上兩種電容。

用(yong)途：在(zai)各種(zhong)直流或中低頻脈動電路中使用(yong)。適宜作為旁(pang)路電容使用(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：63-630V。

損耗角正切：0.3-0.7。

工作(zuo)溫度(du)：-55℃到125℃。

溫度系數：+200 +600ppm。

常(chang)見分類(lei)：跟很多電容(rong)(rong)一樣，滌(di)綸(lun)電容(rong)(rong)還有(you)很多細小的分類(lei)，比如常(chang)見的CL11，CL21；區(qu)別(bie)在于CL21電容(rong)(rong)內(nei)壁(bi)采用金(jin)屬化技術，體(ti)積較(jiao)CL11小很多，但整(zheng)體(ti)性能不如CL11。因此購買時需要向商家說明，是買哪一種。

滌綸電容參數識別

1、國外電容器耐壓值通常用字(zi)母(mu)來(lai)表示基數，常見的代(dai)碼(ma)和基數對應關系是：

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)前面的數表(biao)示(shi)10的冪，比如2A，即(ji)為102*1.0=100V，2C為102*1.6=160V等等。

耐壓值后方的字母表示電(dian)容(rong)容(rong)量，單位為pF。

例(li)如：823表(biao)示容量(liang)為(wei)82*10^3=82000Pf ，224表(biao)示22*104=220000pf=0.22μF；最后的字(zi)母表(biao)示精度，比(bi)如J表(biao)示容量(liang)允許偏(pian)差為(wei)±5%等等。

典型的(de)電容標識(shi)示(shi)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)器的(de)主要(yao)參數(shu)（標(biao)稱容(rong)量、額定電壓、及允(yun)許偏(pian)差）直接標(biao)注在電容(rong)器上，如0.0047μf/275V，0.0047μf是容(rong)量，相當于4700Pf，275V應是耐壓（不屬優選(xuan)數(shu)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)(zi)標注法 一(yi)般是(shi)用3位(wei)數(shu)字(zi)(zi)表示電容器的容量(liang)。其中前兩位(wei)為有(you)效(xiao)(xiao)值數(shu)字(zi)(zi)，第三(san)位(wei)為倍乘數(shu)（即表示有(you)效(xiao)(xiao)值后有(you)多少個(ge)0）。如104，表示有(you)效(xiao)(xiao)值是(shi)10，后面再加4個(ge)0，即100000Pf=0.1μf。

（3）字(zi)(zi)母與數(shu)(shu)字(zi)(zi)混合標注法：用2—4位數(shu)(shu)字(zi)(zi)表示有效值(zhi)，用P、n、M、μ、G、m等字(zi)(zi)母表示有效數(shu)(shu)后(hou)(hou)面的(de)量級。進口電容(rong)器在標注數(shu)(shu)值(zhi)時(shi)不用小數(shu)(shu)點，而是將(jiang)整數(shu)(shu)部分寫在字(zi)(zi)母之前，將(jiang)小數(shu)(shu)部分寫在字(zi)(zi)母后(hou)(hou)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）字母含義：

F ±1%

G ±2%

J ±5%

K ±10%

M ±20%

N ±30%

如104K表示容(rong)(rong)量100000Pf=0.1μf，容(rong)(rong)量允許偏差(cha)為±10%。

（資料來源(yuan)《通用電子元器件的選用與(yu)檢測(ce)》）

國(guo)產電容器(qi)標注(zhu)可查閱《GB/T 2691-1994 電阻器(qi)和電容器(qi)的(de)標志(zhi)代碼(ma)。

滌綸電容的作用

滌綸電(dian)容(rong)是電(dian)子(zi)產品中(zhong)必不可少的一個基本元件(jian)，在電(dian)路中(zhong)充當(dang)著(zhu)濾波、振(zhen)蕩、電(dian)源退耦、脈動信號的旁路及耦合等(deng)。

滌綸電(dian)(dian)容(rong)(rong)的最簡單(dan)結構可由兩個金(jin)屬(shu)板(ban)(ban)(ban)中間(jian)(jian)(jian)夾一層絕緣(yuan)介質組成。在兩個金(jin)屬(shu)板(ban)(ban)(ban)（極板(ban)(ban)(ban)）間(jian)(jian)(jian)加一個電(dian)(dian)壓，極板(ban)(ban)(ban)就能儲(chu)存電(dian)(dian)荷(he)。儲(chu)存電(dian)(dian)荷(he)的大小與極板(ban)(ban)(ban)間(jian)(jian)(jian)電(dian)(dian)壓與極板(ban)(ban)(ban)面(mian)積(ji)（容(rong)(rong)量）成正(zheng)(zheng)比，與極板(ban)(ban)(ban)間(jian)(jian)(jian)的距(ju)(ju)離成反比。Q=CV 即C=Q/V=εS/4πd（《詳見薄膜電(dian)(dian)容(rong)(rong)器理論(lun)計算及修正(zheng)(zheng)》）Q—極板(ban)(ban)(ban)上儲(chu)存的電(dian)(dian)荷(he)；C—電(dian)(dian)容(rong)(rong)器（PF）；V—極板(ban)(ban)(ban)間(jian)(jian)(jian)的電(dian)(dian)壓（V）； ε——介質介電(dian)(dian)常(chang)數（聚(ju)酯膜為3.0，聚(ju)丙(bing)烯膜2.1）； S—金(jin)屬(shu)極板(ban)(ban)(ban)面(mian)積(ji)(mm2)； d—極板(ban)(ban)(ban)間(jian)(jian)(jian)的距(ju)(ju)離(mm)。

滌綸電容的種類

1、按其可調節性分

可分為固定(ding)電容器(qi)(qi)、微(wei)調電容器(qi)(qi)、可變電容器(qi)(qi)三種。

2、按介質分

有(you)氣(qi)體(ti)介(jie)(jie)質(zhi)、無機(ji)(ji)固(gu)體(ti)介(jie)(jie)質(zhi)、有(you)機(ji)(ji)固(gu)體(ti)介(jie)(jie)質(zhi)、電(dian)(dian)(dian)(dian)解(jie)介(jie)(jie)質(zhi)、液(ye)體(ti)介(jie)(jie)質(zhi)及復(fu)合介(jie)(jie)質(zhi)等電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)。 其(qi)中： 氣(qi)體(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)包(bao)(bao)括(kuo)(kuo)空(kong)氣(qi)、真空(kong)、充(chong)氣(qi)式電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)；無機(ji)(ji)固(gu)體(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)包(bao)(bao)括(kuo)(kuo)云母、陶瓷及玻璃釉電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)；有(you)機(ji)(ji)固(gu)體(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)包(bao)(bao)括(kuo)(kuo)有(you)機(ji)(ji)薄(bo)膜及紙介(jie)(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)；電(dian)(dian)(dian)(dian)解(jie)介(jie)(jie)質(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)包(bao)(bao)括(kuo)(kuo)鋁電(dian)(dian)(dian)(dian)解(jie)、鈮電(dian)(dian)(dian)(dian)解(jie)及鉭電(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)；液(ye)體(ti)介(jie)(jie)質(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)包(bao)(bao)括(kuo)(kuo)各(ge)種有(you)機(ji)(ji)油質(zhi)及液(ye)體(ti)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)； 復(fu)合介(jie)(jie)質(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)包(bao)(bao)括(kuo)(kuo)有(you)機(ji)(ji)固(gu)體(ti)復(fu)合、無機(ji)(ji)固(gu)體(ti)復(fu)合、有(you)機(ji)(ji)固(gu)體(ti)與無機(ji)(ji)固(gu)體(ti)復(fu)合制做的電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)。

3、在市場(chang)應用中主(zhu)要是三大類電(dian)容(rong)器：瓷片(pian)電(dian)容(rong)器、薄膜(mo)電(dian)容(rong)器、電(dian)解(jie)電(dian)容(rong)器。這(zhe)三大類電(dian)容(rong)器占市場(chang)量的99%以(yi)上(shang)。