聚合物自复保险丝的工作原理是什么？
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创建于2024-07-21
1个回答
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- 用户_5489 (0)
- 聚合物自复保险丝由聚合物基体及使其导电的碳黑粒子组成。由于聚合物自复保险丝为导体，其上会有电流通过。当有过电流通过聚合物自复保险丝时，产生的热量（为I2R）将使其膨胀。从而碳黑粒子将分开、聚合物自复保险丝的电阻将上升。这将促使聚合物自复保险丝更快的产生热、膨胀得更大，进一步使电阻升高。当温度达到125°C时，电阻变化显著，从而使电流明显减小。此时流过聚合物自复保险丝的小电流足以使其保持在这个温度和处于高阻状态。当故障清除后，聚合物自复保险丝收缩至原来的形状重新将碳黑粒子联结起来，从而降低电阻至具有规定的保持电流这个水平。上述过程可循环多次。
- 创建于2024-07-21
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聚合物自复保险丝什么情况下自复？
聚合物自复保险丝自复是电流、电压和温度的函数。聚合物自复保险丝经常会在温度低至90°c以下时开始自复（可以这样讲低于聚80°c合物自复保险丝已经自复了）
压力对聚合物自复保险丝有何影响？
每种聚合物自复保险丝都有一特定的工作电压、承受特定的冲击电 流。UL 规定聚合物自复保险丝必须在动作6，000 次后仍能表现出PTC 效应。对应用于通讯设备上的SN/SF 聚合物自复保险丝规定了在最大 电压下，少则十几次多达上百次动作后其各种性能参数仍在原有范围 内。设计师们应该认识到这一点：聚合物自复保险丝是用来进行保护 的，而不是用在将其不停的动作动作视为正常工作状态的场合。
在最大电压与冲击电流下聚合物自复保险丝能动作多少次？
每种聚合物自复保险丝都有一特定的工作电压、承受特定的冲击电流。ul规定聚合物自复保险丝必须在动作6，000次后仍能表现出ptc效应。对应用于通讯设备上的sn/sf聚合物自复保险丝规定了在最大电压下，少则十几次多达上百次动作后其各种性能参数仍在原有范围内。设计师们应该认识到这一点：聚合物自复保险丝是用来进行保护的，而不是用在将其不停的动作动作视为正常工作状态的场合。
聚合物自复保险丝动作后多快能复原？
聚合物自复保险丝动作后复原到其低电阻状态所用时间受如下因素的影响：聚合物自复保险丝的种类；如何被贴装或固定；环境温度；动作的内因与持续的时间。一般说来，尽管有许多会在几秒钟内复原，但是大多数聚合物自复保险丝会在几分钟内复原。
聚合物自复保险丝能够进行状态转变吗？怎样才能保持状态不变？
故障事件未被排除时，聚合物自复保险丝不会在正常与动作状态间进 行转变。聚合物自复保险丝动作时，其电阻从低到高，在高阻状态时， 微量的故障电流依然存在。这种小的故障电流足以使其保持在高阻状 态。当故障被清除时，聚合物自复保险丝才能被冷却回到低阻状态.
自复保险丝有那些关键参数？
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抗转为高阻抗的最小电流。 3、最大电压（Vmax）：PTC聚合物 的最大工作电压。 3、 最大电流（Imax）：PTC聚合物自复保险丝能承受的最大电流。 4、 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。 5、 动作时间（Ttrip）：5倍保持电流下最大动作时间。
高分子PTC自复保险丝与其它过流保护器件有什么区别？
1、高分子PTC自复保险丝与普通保险丝最明显的区别在于其可自复的特性，尽管两者都能提供过流保护，但是高分子PTC自复保险丝可以提供很多过流保护，而普通保险丝一旦熔断，必须更换以使电路正常的工作。 2、高分子PTC自复保险丝与双金属片的区别不在于可自复性，双金属片当故障仍然存在时便可自复。当其动作时产生较大的电压并将可能损坏设备的故障重新接通。高分子PTC自复保险丝会一直处于高电阻状态直至故障被排除。 3、高分子PTC自复保险丝与陶瓷自复保险丝的区别在于它们的初始电阻，对故障的反应时间以及尺寸大小，两者都属自复型，但与具有相同保持电流的陶瓷自复保险丝相比，聚合物自复保险丝由于尺寸更小，其动作更快。
聚合物自复保险丝能够进行状态转变吗？怎样才能保持状态不变？
故障事件未被排除时，聚合物自复保险丝不会在正常与动作状态间进行转变。聚合物自复保险丝动作时，其电阻从低到高，在高阻状态时，微量的故障电流依然存在。这种小的故障电流足以使其保持在高阻状态。当故障被清除时，聚合物自复保险丝才能被冷却回到低阻状态。
由一个样品的外表如何确定聚合物自复保险丝的种类？
绝大多数聚合物自复保险丝会印有商标标识与型号。在公司产品说明书中列出了各种标准聚合物自复保险丝产品型号。此外，公司还为用户定做满足其特殊要求的产品。
聚合物自复保险丝在动作状态下能停留多长时间而不损坏？
ul规定聚合物自复保险丝必须在最大电压下停留1000小时而不丧失其ptc特性。聚合物自复保险丝在动作状态下所处的时间愈长愈有可能其电阻值不能复原，由此可能不会符合其初始定义。每种聚合物自复保险丝所能停留的时间随故障事件和类型而不同。
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竞沃（TLC）一次性保险丝选型指南
公司简介 SMD One Time Fuse 高压熔断保险管系列
竞沃 - FUSE,快动线电压SMD保险丝,陶瓷管保险丝,高压SMD保险丝,HIGH VOLTAGE SMD FUSES,一次性表面贴装式保险丝,SLOW BLOW SMD FUSES,一次性SMD保险丝,保险丝,TVS,瞬态电压抑制器,一次性保险丝,快速SMD保险丝,CERAMIC TUBE FUSE,ESD静电抑制器,SMD FUSE,SMD FUSES,FAST ACTING LINE VOLTAGE SMD FUSES,慢速熔断线电压SMD保险丝,慢熔断SMD保险丝,快速熔断保险丝,SLOW BLOW LINE VOLTAGE SMD FUSES,高压熔断保险管,FAST ACTING SMD FUSES,ONE TIME FUSE,SMD保险丝,F12FH2.5,TAF0315,TDF30,TAB40,F06T0.5,TC2.5,TEF10,F06FH0.75,F04F0.25,TAB SERIES,TEF15,TA3VT,TAF0200,TA3VF6.3,F12F2,F12F1,F12F4,F12F3,F12F6,TDF SERIES,TDF25,F12F5,TAF SERIES,F12F8,TA3VF,F12F7,F12F0.5,TAF3.5,TA2VT0100,TDF20,TAB30,TDH60,F12TH40,TA0300,TA3VT1.25,TEF20,10HVB.1.5,F12TH4.5,TEF25,F12FH3.5,F12TH30,6HVC.0.4,6HVC.0.2,TE20,10HVA.80,F06T1.5,6HVC.0.8,TDF50,6HVC.0.5,6HVC.0.6,TE25,TA0315,TAF0300,TA2VT,6HVC.0.25,F12TH20,F04F0.5,5HVA.0.6,F04F0.2,TA3VF3.15,F12TH25,5HVA.8,TA3VT0080,5HVA.6,5HVA.5,F12F1.5,TA2VF,TAF2.5,5HVA.4,TDF40,5HVA.0.2,5HVA.2,TA0200,5HVA.0.5,5HVA.1,5HVA.0.4,TE15,10HVB.0.5,TE10,NSMD1206,F12F20,5HVA,TD20,TDH30,TE40,TA2VT0375,6HVC.1.6,10HVA.63,F06T2.5,TBF50,TA2VT0250,10HVA.60,TAF1.5,TD25,TA1.5,TA3VT0062,TAF0125,F12F12,F12F15,5HVA.1.6,6HVC.1.25,F12F10,TDH25,F04F1.5,TDH20,TE30,TBF40,TA2VT2,TA2VT1,TA3VF0800,10HVA.50,TA0100,F06FH0.25,TA2VT6,TA2VT5,TA2VT4,TB3.5,TA2VT3,F12T3.5,F04F1.25,TA2VT7,6HVA.3.15,10HVB,10HVA,5HVA.XXX,10HVB.15,10HVB.10,10HVB.11,F12F40,TAB25,10HVB.12,MSML1812,TA3VT0050,TD40,TDH50,TE60,6HVC.2.5,TAB20,10HVA.40,F06T3.5,TC3.5,TA3VF SERIES,TAF0100,TA3VF3.5,5HVA.2.5,10HVB.1,F12F30,10HVB.2,10HVA.32,10HVB.4,TAB16,6HVA,6HVC,NSML1206,F04F2.5,TAB15,6HVB,TD30,TDH40,TE50,TBF60,10HVA.30,TA3VF0700,TA0125,TA3VT0150,TB2.5,6HVA.12,6HVC.0.315,F12T4.5,6HVA.10,F12F25,TA2VF7,TA3VF0050,TA2VF5,F04F1,6HVB.30,F04F3,F04F2,F04F4,TB20,F12T15,TD60,TE80,F12T10,F12T12,TA3VT6.3,TB25,TA3VF2.5,6HVD,F04F3.5,TA2VT0500,6HVA.0.2,TB10,TD50,6HVA.0.5,6HVA.0.6,F12F4.5,TAF7.5,6HVA.0.4,TA3VT0375,F06FH3.5,TAF0150,TA2VF SERIES,TABF SERIES,TA3VT0250,TA0700,TB15,5HVA.XXXP,F12F0.375,6HVB.10,TA2VT0630,TA2VT0750,F06F0.5,TB40,F06FH1,F06FH3,F06FH2,F06FH5,F06FH4,F12T30,TA3VF1,TA3VF1.5,TCH SERIES,TA3VF5,6HVB.15,TA3VF4,TA3VT0125,TA3VF3,MSMD1812,TA3VF2,TE100,TBF SERIES,10HVB SERIES,TA3VF0062,TA3VF7,TA3VF6,TA SERIES,F12F0.25,6HVB.20,TA2VT0400,TA12,TAF6.3,TA10,TB30,F12FH0.25,F12T25,TEF80,TAF0250,TA0600,F06F0.375,TE SERIES,F12T20,TA15,6HVB.25,TAF0375,TRA,F12FH0.75,F12TH10,TRC,TRB,F12TH12,6HVD.10,TRE,F06F1,F12TH15,TA3VF1.25,TRG,F06F1.5,F06F3,TRF,F06F2,F06F5,F06F4,F06F7,F06F6,TRM,F06F8,TB60,TA3VT0100,TEF50,USMD1210,TAF0080,TA3VT SERIES,LSMD2920,6HVD.15,F12FH0.5,6HVA.2.5,6HVD.20,6HVC.XXXP,F12F2.5,TA2VT0300,ASML0402,TB50,TDF60,TEF60,TA0500,TCH1.25,F04F0.375,6HVD.25,TBF3.5,TA3VF0080,F12FH1.25,TA2VT0315,F06F2.5,TA0750,TA0630,TAF0062,TEF30,TA3VT0200,F12FH1.5,6HVA.1.6,F12F3.5,TA2VT0200,TA0400,TEF40,TAF0050,F06F3.5,TBF2.5,F06T0.75,TA3VT0315,6HVD.50,6HVC.XX,5HVA.10,TA1.25,TA7.5,5HVA.12,TA3VT0300,TA3VT2.5,5HVA.16,5HVA.15,TDH SERIES,10HVB.0.44,10HVA SERIES,F12T1.75,TA3VF0200,USML1210,TA2VT3.15,TA2VT6.3,TB SERIES,6HVD.30,TA2VF1.5,F06T0.25,TA6.3,6HVD SERIES,FSML0603,TA3VT3.5,TABF16,TA3VT0400,TABF15,6HVD.40,TA2VT0800,TABF20,TA3VF0100,F06F0.25,TD,TA3VT0630,TA3VT0750,F12T2,F12T1,F12T4,F06FH0.5,F12T3,F12T6,F12T5,F12T8,F12T7,F04F0.315,TAF1.25,TABF25,TA3VF0250,6HVD.5,TABF30,F12T0.75,TA3VF0375,F12FH20,TA3VT0500,TEF100,F12T0.63,TA2VT0700,TABF40,TA3VF0125,TA3.15,F06FH1.5,6HVA.0.315,F12FH12,F12FH10,F12FH15,TBF7.5,TA3VF0150,10HVA.31.5,TEF5,TAF3.15,TA3VT1.5,FSMD0603,TA3VT0600,TA2VT0600,5HVA.20,TA0800,F06FH2.5,TBF6.3,TEF2,TEF1,F12F0.75,TA2VF3,F12FH0.375,TA2VF2,TA2VF1,5HVA SERIES,TBF15,TBF10,TA0250,TA3VT3,TA3VT2,TA3VT1,TA0375,TA3VT7,TA3VT6,TA3VT5,TA3.5,TA3VT4,TAF0600,TA3VT0700,TAF0700,6HVC SERIES,6HVA SERIES,TD SERIES,TA3VF0600,5HVA.3.1,F06FH0.375,F12T1.5,TA2VT2.5,6HVC.3,PSML0805,F12T1.25,6HVC.1,6HVC.2,TA0150,TA3VF0750,TA3VF0630,TBF30,F12FH6,TA2VF0500,F12FH5,F12FH8,TA2.5,F12FH7,F12FH2,TA2VT0080,F12FH1,F12FH4,TABF,F12FH3,TA3VT0800,TA3V3.15,TA2,TA1,TBF25,TA4,TAF0800,TA3,TA6,TBF20,TA5,TEF SERIES,TA8,TA7,TA3VF0500,F04F0.75,TAB,F12T2.5,TAF,TA2VT1.5,TAL,F06F0.75,TB1,TB3,TB2,TB5,TB4,TBF8,TA0050,TB6,TB8,TA2VT1.25,TBF,TAF0400,TC2,TC1,TC4,TC3,TC5,TA0062,TA3VF0400,TB7.5,TA2VT SERIES,6HVA.0.25,TCH,TBF6,TBF5,TAF0630,TBF4,TAF0750,TBF3,TBF2,TCH2,TBF1,TCH1,F12TH8,6HVA.5,F06T8,F12TH7,6HVA.6,6HVA.8,6HVA.1,6HVA.2,F12TH6,6HVA.3,F12TH5,6HVA.4,TA3VF0315,TDF,F06T1,TAF0500,TDH,PSMD0805,F06T3,F06T2,F06T5,F06T4,F06T7,F06T6,TE2,TE1,5HVA.6.3,TAF15,TA0080,TAF12,TE5,TAF10,6HVB SERIES,TA3VF0300,TB6.3,TEF,TAF8,TAF7,TC SERIES,TAF6,TAF5,TA2VT3.5,TAF4,TAF3,TAF2,TAF1,通讯设备,锂电池,电脑,家电行业,多媒体电子设备,汽车电子行业,电动玩具,工业,监控工业
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