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MOSFETS </a> </div> </div> <div class="rig_con"> <div class="top"> <h1 class="title"> 了解插件（MOV）壓敏電阻一篇就夠-干貨 </h1> <div class="meg"> <div class="firsts">發布時間：2021-08-06</div> <div class="">已被瀏覽：<span>3605</span>次</div> <div class="shape"> <span>分享到：</span> <div class="bdsharebuttonbox" style="display:inline-block;vertical-align:middle;"><a href="#" class="bds_more" data-cmd="more"></a><a href="#" class="bds_qzone" data-cmd="qzone" title="分享到QQ空間"></a><a href="#" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a><a href="#" class="bds_sqq" data-cmd="sqq" title="分享到QQ好友"></a><a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a><a href="#" class="bds_renren" data-cmd="renren" title="分享到人人網"></a></div> <script> window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)]; </script> </div> </div> </div> <div class="con"> <span style="font-family:新宋體,arial;"><span style="font-size:16px;"><span style="line-height:200%;">前言：過壓元件根據作用分為鉗位型和開關型。而開關型過壓元件是眾所周知的防雷器件，有陶瓷氣體放電管、半導體放電管和玻璃放電管。則鉗位型是過壓元件有瞬態抑制二極管、插件壓敏電阻、<a href="http://www.forsakring-online.com/products/category-477/">貼片壓敏電阻</a>、ESD放電二極管。那么本篇內容主要重點講解鉗位型的過壓保護器件的<a href="http://www.forsakring-online.com/products/category-533/"><span style="color:#FF0000;"><strong>插件壓敏電阻</strong></span></a>（MOV）。<br /> <img alt="了解插件（MOV）壓敏電阻一篇就夠-干貨" src="/u_file/2104/photo/2104/2021040117493227.jpeg" /><br /> 一、插件（MOV）壓敏電阻簡介<br /> 壓敏電阻是最常用的限壓器件。壓敏電阻有碳化硅壓敏電阻和氧化鋅壓敏電阻。常用的是氧化鋅(ZnO)的壓敏電阻，主要是以氧化鋅為原料，添加多種微量金屬氧化物，混合成形、燒結組裝而成的過壓保護器件，其外包環氧樹脂(可添加顏料)。利用壓敏電阻的非線性特性，當電壓出現在壓敏電阻的兩極之間時，壓敏電阻可以將電壓鉗位為相對固定的電壓值，實現后級電路的保護。<br /> <br /> 二、插件（MOV）壓敏電阻工作原理<br /> 插件（MOV）壓敏電阻相當于可變電阻，并聯于電路中，使電路正常使用時，壓敏電阻阻抗高，漏電流小，可視為開路，對電路幾乎沒有影響。然而，當高突波電壓到來時，壓敏電阻的電阻值瞬間降低(其電阻值可以從ω(兆歐)級變為ω(毫歐)級)，使其能夠流過大電流，同時將過電壓鉗位在一定值。由于壓敏電阻的突波承載能力取決于其物理尺寸，因此可能獲得不同的浪涌電流值。<br /> <br /> 壓敏電阻的最大特點是，當添加到上面的電壓低于閥值“UN”時，流過的電流極小，相當于關閉的閥，當電壓超過UN時，阻力值變小。其電阻值變小，流過的電流急劇增加，對其他電路的影響變化少，過電壓對后續敏感電路的影響減小。利用該功能，可以抑制電路中常見的異常過電壓，保護電路免受過電壓的損傷。<br /> <br /> 三、插件（MOV）壓敏電阻特性參數<br /> （1）標稱壓敏電壓(V)：指規定持續時間的脈沖電流(一般為1mA，持續時間一般為400mS以下)時壓敏電阻兩端的電壓值；<br /> （2）電壓比：指壓敏電阻的電流為1mA時產生的電壓值與壓敏電阻的電流為0.1mA時產生的電壓值之比；<br /> （3）最大限制電壓(V)：在壓敏電阻能夠承受的最大脈沖峰值電流Ip和規定波形下變阻器兩端的電壓峰值；<br /> （4）殘壓比：當壓敏電阻的電流為某一值時，其兩端產生的電壓稱為該電流值的殘壓。殘壓比是殘壓與標稱電壓的比率；<br /> （5）通流容量（kA）：通流容量也稱通流量，是指在規定的條件（規定的時間間隔和次數，施加標準的沖擊電流）下，允許通過壓敏電阻器上的最大脈沖（峰值）電流值；<br /> （6）漏電流(mA)：漏電流也稱為等待電流，是指變阻器在規定的溫度和最大直流電壓下流過變阻器的電流；<br /> （7）電壓溫度系數：指在規定的溫度范圍(溫度為20℃~70℃)內，變壓器稱為電壓的變化率，即當變壓器的電流保持一定時，當溫度變化為1℃時，變壓器兩端電壓的相對變化；<br /> （8）電流溫度系數：當壓敏電阻兩端的電壓保持恒定時，當溫度變化為1℃時，壓敏電阻電流的相對變化；<br /> （9）電壓非線性系數：指壓敏電阻器在給定的額外電壓下的靜態電阻值與動態電阻值之比；<br /> （10）絕緣電阻：指壓敏電阻的引線(引腳)和電阻體絕緣面之間的電阻值；<br /> （11）靜電容量(PF)：指壓敏電阻本身固有的電容容量；<br /> （12）額定功率：在特定環境溫度85℃下工作1000小時，最大功率變化小于10%；<br /> （13）最大沖擊電流(8/20us)：特定脈沖電流(8/20us波形)沖擊變阻器一次或一次間隔5分鐘)，壓敏電壓的變化仍在10以內；<br /> <br /> 四、插件（MOV）壓敏電阻選型步驟<br /> （1）選型壓敏電阻的電壓時要高于用戶的正常工作電壓，并且要留有一定余量；<br /> （2）壓敏電阻的通流量應根據防雷電路的設計指標來定，壓敏電阻通流量需大于防雷電路設計的通流容量；<br /> <br /> 五、插件（MOV）壓敏電阻特點<br /> 壓敏電阻的響應時間為ns級，比空氣放電管快，比TVS管稍慢一些，一般情況下用于電子電路的過電壓保護其響應速度可以滿足要求。壓敏電阻的結電容量一般在數百到數千Pf的數量范圍內，多數情況下不應直接應用于高頻信號線路的保護，應用于交流電路的保護時，結電容量大會增加漏電流，因此在設計防護電路時需要充分考慮。壓敏電阻通流容量大，但小于氣體放電管。<br /> <br /> 六、插件（MOV）壓敏電阻應用<br /> 主要用于交流/直流電源電路和各種低頻信號、控制電路板、電源系統、浪涌抑制器、安全系統、電機保護、汽車電子系統、家用電器及相關防雷模塊的浪涌保護。<br /> <br /> 七、我司順?？萍即鞸OCAY碩凱插件（MOV）壓敏電阻產品系列如下<br /> 規格系列：05D系列、07D系列、10D系列、14D系列、20D系列、25D系列、32D系列、34S系列、40D系列、53D系列；<br /> <br /> 產品外形規格：封裝形式主要有圓片形和方片形兩大類，也有貼片形、大電流模塊和高電壓模塊等；<br /> <br /> 產品電壓：18V-1800V；<br /> <br /> 產品特性：通流量大（100A~70kA）其體積越大所能承受的浪涌電流越大、種類齊全，使用范圍廣；<br /> <br /> 以上內容主要介紹插件（MOV）壓敏電阻詳解，如需要插件壓敏電阻或貼片壓敏電阻請留言聯系或<span style="color:#FF0000;">撥打：0755-28100016；</span>海量壓敏電阻現貨庫存，規格齊全。歡迎來咨詢價格或拿樣測試。<br /> <br /> 深圳順?？萍加邢薰臼且患乙源頌橹鞯碾娮釉骷?、半導體器件、保護器件的整合供應商，主營TVS瞬態抑制二極管、ESD靜電保護器、GDT陶瓷氣體放電管、TSS半導體放電管、NTC熱敏電阻、壓敏電阻、保險絲、合金電阻、貼片電阻、精密電阻、晶圓電阻、貼片保險絲、自恢復保險絲、貼片電容、鉭電容、電解電容、鋁電解電容、超級電容、連接器等相關產品線，品牌可選華德、碩凱、薩瑞微、億能、特思嘉、基美(KEMET)、天二、旺詮、大毅、村田、太誘、TDK、AVX、威世、風華、華新科、三瑩、國巨、立隆、厚聲、光頡、順絡、麥捷、禾伸堂等知名品牌。</span></span></span> </div> <div id="page" class="wow fadeInUp wrap"> <div class="page-btn prev">上一篇 : <a href="/faq/news-i01426i1.html">壓敏電阻老化解決方法-干貨</a></div> <div class="page-btn next">下一篇 : <a href="/faq/news-i01424i1.html">熱敏電阻和壓敏電阻之間的區別</a></div> </div> <div class="returns"> <a href="/faq/category-11/page-2.html" class="returns"><img oncontextmenu="return false;" src="/images/return.png" /> 返回列表</a> </div> <div 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