深圳市尧丰发科技有限公司

自恢复保险丝原理 自恢复保险丝(以下简称保险丝)由聚合物树脂基体及分布在里面的导电粒子组成，在正常情况下，导电粒子在树脂基体中构成链状导电通路，保险丝表现为低阻抗（a）。电路中有过电流发生时，流经保险丝的大电流产生的热量使聚合物树脂基体体积膨胀，切断了导电粒子形成的链状导电通路，导致保险丝的阻抗迅速升高，从而起到对电路的过流保护作用（b）。故障排除后，树脂重新冷却结晶，体积收缩，导电粒子重新形成导电通路，保险丝恢复为低阻抗。 自恢复保险丝参数 在自恢复保险丝选型过程中，主要涉及以下参数 1. 保持电流（Ih）：25℃静止空气环境中不触发电阻突越的最高电流。 2. 触发电流（It）：25℃静止空气环境中PTC聚合物自复保险丝从低阻转为高阻抗的最小电流。 3. 最大电压（Vmax）：PTC聚合物自复保险丝的最大工作电压。 4. 最大电流（Imax）：PTC聚合物自复保险丝能承受的最大电流。 5. 动作功率（Pdtyp.）：25℃环境温度时PTC聚合物自复保险丝动作状态下的消耗功率。 6. 动作时间（Ttrip）：5倍保持电流下最大动作时间。 1. SMD0805P010TF SMD0805P020TF SMD0805P035TF SMD0805P050TF SMD0805P075TF SMD0805P100TF SMD1206P012TF SMD1206P016TF SMD1206P020TF/24 SMD1206P025TF SMD1206P035TF/16 SMD1206P050TF SMD1206P050TF/15 SMD1206P075TF SMD1206P075TF/13.2 SMD1206P100TF SMD1206P110TF SMD1206P150TF SMD1026P200TF SMD1210P005TF SMD1210P010TF SMD1210P020TF SMD1210P035TF SMD1210P050TF SMD1210P075TF SMD1210P110TF SMD1210P150TF SMD1812P010TF SMD1812P014TF SMD1812P020TF SMD1812P050TF SMD1812P075TF SMD1812P075TF/24 SMD1812P075TF/33 SMD1812P110TF SMD1812P110TF/16 SMD1812P110TF/24 SMD1812P110TF/33 SMD1812P125TF/16 SMD1812P125TF/6,4L SMD1812P150TF/8 SMD1812P150TF/12 SMD1812P150TF/24 SMD1812P160TF/8(4L) SMD1812P200TF SMD1812P260TF SMD1812P300TF SMD2016P030TF SMD2016P050TF SMD2016P100TF SMD2016P100TF/33 SMD2016P150TF SMD2016P200TF SMD2920P030TF SMD2920P050TF SMD2920P075TF SMD2920P100TF SMD2920P125TF SMD2920P150TF SMD2920P185TF SMD2920P200TF SMD2920P200TF/24 SMD2920P250TF SMD2920P260TF SMD2920P300TF SMD2920P300TF/15 专业生产和销售：ESD静电阻抗器，贴片压敏电阻，压敏电阻，热敏电阻，瞬态抑制二极管，整流二极管，陶瓷放电管，玻璃放电管，半导体放电管，自恢复保险丝，ESD静电二极管。