自恢復保險絲(以下簡稱保險絲)由聚合物樹脂基體及分布在里面的導電粒子組成,在正常情況下,導電粒子在樹脂基體中構成鏈狀導電通路,保險絲表現(xiàn)為低阻抗(a)。電路中有過電流發(fā)生時,流經(jīng)保險絲的大電流產(chǎn)生的熱量使聚合物樹脂基體體積膨脹,切斷了導電粒子形成的鏈狀導電通路,導致保險絲的阻抗迅速升高,從而起到對電路的過流保護作用(b)。故障排除后,樹脂重新冷卻結晶,體積收縮,導電粒子重新形成導電通路,保險絲恢復為低阻抗。自恢復保險絲原理自自恢復保險絲參數(shù) 在自恢復保險絲選型過程中,主要涉及以下參數(shù)1. 保持電流(Ih):25℃靜止空氣環(huán)境中不觸發(fā)電阻突越的最高電流。2. 觸發(fā)電流(It):25℃靜止空氣環(huán)境中PTC聚合物自復保險絲從低阻轉(zhuǎn)為高阻抗的最小電流。3. 最大電壓(Vmax):PTC聚合物自復保險絲的最大工作電壓。4. 最大電流(Imax):PTC聚合物自復保險絲能承受的最大電流。5. 動作功率(Pdtyp.):25℃環(huán)境溫度時PTC聚合物自復保險絲動作狀態(tài)下的消耗功率。6. 動作時間(Ttrip):5倍保持電流下最大動作時間。SMD0805P010TF SMD0805P020TF SMD0805P035TF SMD0805P050TFSMD0805P075TF SMD0805P100TF SMD1206P012TF SMD1206P016TFSMD1206P020TF/24 SMD1206P025TF SMD1206P035TF/16 SMD1206P050TFSMD1206P050TF/15 SMD1206P075TF SMD1206P075TF/13.2 SMD1206P100TFSMD1206P110TF SMD1206P150TF SMD1026P200TF SMD1210P005TFSMD1210P010TF SMD1210P020TF SMD1210P035TF SMD1210P050TF SMD1210P075TF SMD1210P110TF SMD1210P150TF SMD1812P010TFSMD1812P014TF SMD1812P020TF SMD1812P050TF SMD1812P075TFSMD1812P075TF/24 SMD1812P075TF/33 SMD1812P110TF SMD1812P110TF/16SMD1812P110TF/24 SMD1812P110TF/33 SMD1812P125TF/16 SMD1812P125TF/6,4LSMD1812P150TF/8 SMD1812P150TF/12 SMD1812P150TF/24 SMD1812P160TF/8(4L)SMD1812P200TF SMD1812P260TF SMD1812P300TF SMD2016P030TFSMD2016P050TF SMD2016P100TF SMD2016P100TF/33 &n
關于我們 | 友情鏈接 | 網(wǎng)站地圖 | 聯(lián)系我們 | 最新產(chǎn)品
浙江民營企業(yè)網(wǎng) bus1net.com 版權所有 2002-2010
浙ICP備11047537號-1