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DC48V電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)廣泛應用於(wu)通信(xin)設(she)備(bei)、計算機(ji)網絡、工(gong)控自動化、鐵路(lu)(lu)信(xin)號控製、航空航天等領域。在這(zhe)些(xie)領域中，直流(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)是必不可少的(de)(de)能源(yuan)(yuan)供應方式(shi)，以保(bao)證這(zhe)些(xie)設(she)備(bei)的(de)(de)安(an)全、穩定和可靠運行(xing)。在DC 48V直流(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)實際(ji)應用中，其復雜的(de)(de)電(dian)(dian)(dian)(dian)(dian)磁環境，容(rong)易(yi)導致(zhi)設(she)備(bei)遭受雷擊(ji)浪(lang)湧(yong)過(guo)電(dian)(dian)(dian)(dian)(dian)壓(ya)影響而損壞。因此，對於(wu)電(dian)(dian)(dian)(dian)(dian)子(zi)工(gong)程師來(lai)說，DC 48V直流(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)端口(kou)雷擊(ji)浪(lang)湧(yong)保(bao)護(hu)是不容(rong)忽視的(de)(de)。接下來(lai)，高(gao)品質電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)保(bao)護(hu)器(qi)件廠(chang)商及電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)保(bao)護(hu)解(jie)決方案服務商東沃電(dian)(dian)(dian)(dian)(dian)子(zi)（DOWOSEMI）針(zhen)對DC直流(liu)48V電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)雷擊(ji)浪(lang)湧(yong)進行(xing)了保(bao)護(hu)方案設(she)計，如下圖(tu)所示(shi)：

方案說明

從東沃DC 48V直(zhi)流(liu)電(dian)(dian)源端(duan)口雷擊(ji)浪(lang)湧(yong)過(guo)壓(ya)保(bao)護(hu)方案(an)圖可知，前端(duan)選(xuan)用(yong)了通流(liu)能力強的(de)GDT陶瓷氣體放電(dian)(dian)管2R90A-Q和MOV壓(ya)敏電(dian)(dian)阻14D820K組合來泄放浪(lang)湧(yong)產(chan)生(sheng)的(de)大電(dian)(dian)流(liu)，中(zhong)間選(xuan)用(yong)電(dian)(dian)感做退耦(ou)，末級使用(yong)導通電(dian)(dian)壓(ya)精準度高、響應速度快(kuai)、低漏電(dian)(dian)流(liu)、鉗位電(dian)(dian)壓(ya)低的(de)TVS二極管 SMDJ58CA做保(bao)護(hu)，讓(rang)後端(duan)的(de)電(dian)(dian)路得到有效的(de)防護(hu)，滿(man)足IEC 61000-4-5 Level 4 雷擊(ji)浪(lang)湧(yong)防護(hu)需求的(de)同時，具有很好(hao)的(de)兼容冗余設計，使其適用(yong)於各種(zhong)工業(ye)級產(chan)品。

器件參數

1）東沃陶瓷氣體(ti)放電(dian)管2R90A-Q參數：

2）東沃壓(ya)敏電(dian)阻14D820K參(can)數：

3）東沃(wo)TVS二極管SMDJ58CA參(can)數：

以上是東沃DC 48V直流電源端口雷擊浪湧過壓保護經典方案，如有特殊需求，歡迎前來探討。浪湧靜電防護方案，找東沃電子，電路保護不迷路！方案中選用到的陶瓷(ci)氣體放電管(guan)2R90A-Q、壓敏電阻14D820K和雙向TVS二極管SMDJ58CA，東沃電子現已全面量產、品質穩定、高可靠性、交期迅速、廠家價格、免費樣品、免費EMC測試、免費選型，歡迎廣大新老客戶前來咨詢：137 5773 6996（微信同號）余工