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MOSFETS </a> </div> </div> <div class="rig_con"> <div class="top"> <h1 class="title"> 細說影響貼片電阻的工作壽命因素有哪些 </h1> <div class="meg"> <div class="firsts">發布時間：2021-08-03</div> <div class="">已被瀏覽：<span>2194</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：一般來說，<a href="http://www.forsakring-online.com/"><span style="color:#FF0000;"><strong>電阻</strong></span></a>的失效率相對于其他器件來說，是比較大低的，所以我們一般評估電阻的壽命比較少。但是，由于高壓高溫時效率上升，有些場景需要仔細評價電阻的壽命。而影響<a href="http://www.forsakring-online.com/"><span style="color:#FF0000;"><strong>貼片電阻</strong></span></a>工作壽命有哪些？下面小編詳細介紹。<br /> <br /> 影響貼片電阻工作壽命因素<br /> （1）溫度,溫度過高可以很快使其燒毀；<br /> （2）環境的酸堿度,直接腐蝕電阻導致其損壞；<br /> （3）外力,超過一定的力的限度,電阻就會斷裂；<br /> <br /> 因此，應延長電阻壽命，良好的散熱，防止燒毀，環境干燥，無污染物，避免外力。電阻值大的電阻壽命相對較長。MΩ級電阻值高，低壓使用時功耗少，作業環境影響小，一般壽命長，無需特別注意(與其他電解電容器等部件相比)。問題多發生在高壓工作中。高壓工作時,電阻的制造工藝、使用材質都有相當的要求。要考慮使用功率往往會用到最大的可能(電阻的安全功率值是實際工作功率的兩倍以上,有些產品設計不當,往往使用功率和電阻額定功率值過于接近），所以溫度的耐受能力是最基本的要求。另外瞬間脈沖電壓和涌浪電流也給電阻帶來了致命的打擊。對于引腳焊接不良、絕緣工藝有缺陷的產品，不久就會崩潰燒毀。正確使用的電阻，壽命在10萬小時以上沒有問題。<br /> <img alt="細說影響貼片電阻的工作壽命因素有哪些" src="/u_file/2107/photo/2107/2021072817164736.jpeg" /><br /> 所以像1MΩ這樣的高阻值電阻是有區分高壓和一般用途的。高壓專用的電阻價格比一般電阻高數倍，不過電阻終究是低價元件，而且在高壓使用的電阻數量不是很多。對于高壓大電流的場景，留有足夠的降額設計，可以有效提高電阻的壽命。<br /> <br /> 而電阻在使用和不使用的情況下，壽命是較為不同的。電阻在不同的使用場景下，壽命也會不同。所以電阻的壽命有兩個：負載壽命和貨架壽命。電阻負載壽命Load Life，全稱應該是Load Life Stability。電阻器在額定功率長期負荷下，阻值相對變化的百分數，表示電阻器壽命長短的參數。<br /> <br /> 所謂的電阻負載壽命就是電阻被使用的情況下預估的壽命，其實電阻的負載壽命和影響電阻的這三方面的因素相關：電阻的功率、溫度和使用時間。電阻阻值變化的活躍期是在使用的前幾百個小時，隨著使用時間越長越是趨于穩定。這是由于隨著時間的推移，電阻元素本身趨于穩定，或者電阻元素和基體之間的應力逐漸釋放。電阻負載壽命的指標只能通過抽樣測試，通過樣品測試折算出產品的預計壽命。因為這種測試至少需要1千小時，航天的應用則可能需要高達1萬小時的測試，且這種測試是破壞性的實驗。電阻的負載壽命，一般會被標注在器件資料中，如下表格所示。</span></span></span><br /> <table border="1" cellspacing="0" style="border-collapse:collapse;border:none;"> <tbody> <tr> <td style="width:189px;padding:0.0000pt 5.4000pt 0.0000pt 5.4000pt ;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top:1.0000pt solid windowtext;border-bottom:1.0000pt solid windowtext;vertical-align:top;"><span style="font-family:新宋體,arial;"><span style="font-size:16px;"><span style="line-height:200%;">Load Life</span></span></span></td> <td style="width:189px;padding:0.0000pt 5.4000pt 0.0000pt 5.4000pt ;border-left:none;border-right:1.0000pt solid windowtext;border-top:1.0000pt solid windowtext;border-bottom:1.0000pt solid windowtext;vertical-align:top;"><span style="font-family:新宋體,arial;"><span style="font-size:16px;"><span style="line-height:200%;">70℃on-off cycle 1,000hrs</span></span></span></td> <td style="width:189px;padding:0.0000pt 5.4000pt 0.0000pt 5.4000pt ;border-left:none;border-right:1.0000pt solid windowtext;border-top:1.0000pt solid windowtext;border-bottom:1.0000pt solid windowtext;vertical-align:top;"><span style="font-family:新宋體,arial;"><span style="font-size:16px;"><span style="line-height:200%;">+5%</span></span></span></td> </tr> </tbody> </table> <span style="font-family:新宋體,arial;"><span style="font-size:16px;"><span style="line-height:200%;"> <br /> 結尾：電阻貨架壽命是指電阻不被使用的場景下，只是存儲在庫房的時候的壽命。電阻的貨架壽命也就是指存儲條件下的阻值穩定性。電阻的貨架壽命和負載壽命一樣，電阻存放的時間越長，其阻值的變化也會趨于穩定。通常一些使用精密儀器制造設備使用精密電阻并不立即使用，而是存儲一些時間再去使用，因為存儲一段時間之后電阻值穩定性更好。所電阻的存儲尤其要注意濕度控制，濕度對于任何電阻的阻值都會產生很大的影響。<br /> <br /> 以上內容主要介紹影響貼片電阻工作壽命因素，如需要貼片電阻相關產品請留言聯系或<span style="color:#FF0000;">撥打：0755-28100016；</span>海量貼片電阻現貨庫存，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 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