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對1Ω(歐姆)以上阻值的電阻,與標識阻值相比±0.5%以內(nèi)阻值誤差的電阻可稱為JEPSUN精密電阻,更高精密的可以做到0.01%精度,也就是電子工程師所說的萬分之一精度,此類電阻一般為薄膜電阻,使用此材質(zhì)的電阻一般才能滿足生產(chǎn)工藝要求。這類阻值1Ω以上電阻的普通系列精密度在±5%以上,電子產(chǎn)品上最常見的就是5%精度的電阻,不屬于精密電阻范圍。1Ω以下阻值的電阻,一般能達到±1%精密度之內(nèi),就算做高精度電阻范疇了,因為阻值基數(shù)很小,就算是1%的誤差,實際的阻值誤差已經(jīng)很小了。更高精密電阻的可以做到±0.5%以內(nèi),但工藝要求,技術(shù)要求較高。

以下是電子產(chǎn)品中常用電阻標準阻值常用數(shù)字列舉如下:

100,101,102,104,105,106,107,110,111,113,114,115,117,118,120,121,123,124,

126,127,129,130,132,133,135,137,138,140,142,143,145,147,149,150,152,154,

156,158,160,162,164,165,167,169,172,174,176,178,180,182,184,187,189,191,

193,196,198;200,203,205,208,210,213,215,218,220,221,223,226,229,232,

234,237,240,243,246,249,252,255,258,261,264,267,270,271,274,277,280,284,

287,291,294,298;300,301,305,309,312,316,320,324,328,330,332,336,340,344,348,352,

357,360,361,365,370,374,379,383,388,390,392,397,400,402,407,412,

417,422,427,432,437,442,448,453,459,464,470,475,481,487,493,499;

500,505,511,517,523,530,536,542,549,556,562,569,576,583,590,597;

600,604,612,619,626,634,642,649,657,665,673,681,690,698;

700,706,715,723,732,741,750,759,768,777,787,796;

800,806,816,825,835,845,856,866,876,887,898;

900,909,920,931,942,953,965,976,988;

以上數(shù)字是常用電阻標準阻值阻值常用數(shù)字。數(shù)字無單位,如383,表示38.3歐姆,383歐姆,3830歐姆,38.3K歐姆等等均可(電阻單位如Ω歐姆,mΩ毫歐,KΩ千歐,MΩ兆歐等)!

高精度電阻精度常見如:1%百分之一,0.5%千分之五,0.25%,0.1%千分之一,0.05%萬分之五,0.01%萬分之一

高精度電阻常規(guī)溫漂如:±50ppM(TCR50),±25PPM(TCR25),±15PPM(TCR15),±10PPM(TCR10),±5PPM(TCR5)

以上分析供參考,電阻的生產(chǎn)工藝及各類材料更新迅速,技術(shù)發(fā)展日新月異。相關(guān)表格供需要者查看,以免誤用特殊阻值,影響使用方便。