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WK39H/WK36開(kāi)關(guān)二極管工作特性

WK39H/WK36開(kāi)關(guān)二極管同普通的二極管一樣,也是一個(gè)PN結(jié)的結(jié)構(gòu),不同之處是要求這種二極管的開(kāi)關(guān)特性好。當(dāng)給開(kāi)關(guān)二極管加上正向電壓時(shí),二極管處于導(dǎo)通狀態(tài),相當(dāng)于開(kāi)關(guān)的通態(tài);當(dāng)給開(kāi)關(guān)二極管加上反向電壓時(shí),二極管處于截止?fàn)顟B(tài),相當(dāng)于開(kāi)關(guān)的斷態(tài)。二極管的導(dǎo)通和截止?fàn)顟B(tài)完成開(kāi)與關(guān)功能。開(kāi)關(guān)二極管就是利用這種特性,且通過(guò)制造工藝,開(kāi)關(guān)特性更好,即開(kāi)關(guān)速度更快,PN結(jié)的結(jié)電容更小,導(dǎo)通時(shí)的內(nèi)阻更小,截止時(shí)的電阻很大。

WK39H/WK36開(kāi)關(guān)二極管


開(kāi)關(guān)二極管從截止(高阻狀態(tài))到導(dǎo)通(低阻狀態(tài))的時(shí)間叫開(kāi)通時(shí)間;從導(dǎo)通到截止的時(shí)間叫反向恢復(fù)時(shí)間;兩個(gè)時(shí)間之和稱為開(kāi)關(guān)時(shí)間。一般反向恢復(fù)時(shí)間大于開(kāi)通時(shí)間,故在開(kāi)關(guān)二極管的使用參數(shù)上只給出反向恢復(fù)時(shí)間。開(kāi)關(guān)二極管的開(kāi)關(guān)速度是相當(dāng)快的,像硅開(kāi)關(guān)二極管的反向恢復(fù)時(shí)間只有幾納秒,即使是鍺開(kāi)關(guān)二極管,也不過(guò)幾百納秒。


這類開(kāi)關(guān)二極管具有開(kāi)關(guān)速度快、體積小、壽命長(zhǎng)、可靠性高等特點(diǎn),廣泛應(yīng)用于電子設(shè)備的開(kāi)關(guān)電路、檢波電路、高頻和脈沖整流電路及自動(dòng)控制電路中。


WK39H/WK36開(kāi)關(guān)二極管


WK39H/WK36采用硅反外延材料制作,臺(tái)式結(jié)構(gòu),玻璃鈍化保護(hù),多層金屬做上下電極。采用玻殼封裝,氣密性好,引出端為無(wú)氧銅,表面涂層為錫。器件一般用于微波開(kāi)關(guān)電路等。


產(chǎn)品特點(diǎn)

1、玻璃管殼封裝

2、擊穿電壓高

3、體積小,重量輕

4、工作穩(wěn)定,可靠性高


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