PPTC自恢复保险丝
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PPTC自恢复保险丝
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一、PPTC的简介 自恢复保险丝，简称PPTC.是一种正温度系数聚合物热敏电阻，作过流保护用，可代替电流保险丝。电路正常工作时它的阻值很小(压降很小)，当电路出现过流使它温度升高时，阻值急剧增大几个数量级，使电路中的电流减小到安全值以下，从而使后面的电路得到保护，过流消失后自动恢复为低阻值。其效果与开关组件类似，只是响应速度较慢。 二、PPTC的选用技巧 ●正常工作电流- IHOLD ●电路电压最大值- VMAX ●最大中断电流- IMAX ●工作环境温度 2.选择合适的封装形式:贴片PTC或者插件PTC。 3.比较的VMAX和IMAX的PTC数据表中的评级，以确保电路参数不超过这些额定值。 4.验证PTC的运行环境温度为它的正常工作范围内。确定Ihold和IMAX的温度曲线。 |
| Part Number |
Ih(A)
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Vmax(Vdc)
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Imax(A)
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Trip current(A)
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Trip time(s)
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Rmax(Ω)
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Rmin(Ω)
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Pdtyp(W)
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It(A)
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Package
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Inner Diagram | Data sheet |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SMD1812P150TF/16 | 1.5 | 16 | 100 | 8 | 0.5 | 0.16 | 0.04 | 0.8 | 3 | 1812 |
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| SMD1812P150TF/24 | 1.5 | 24 | 100 | 8 | 0.5 | 0.16 | 0.04 | 0.8 | 3 | 1812 |
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| SMD1812P160TF | 1.6 | 8 | 100 | 8 | 1 | 0.13 | 0.03 | 0.8 | 2.8 | 1812 |
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| SMD1812P200TF | 2 | 8 | 100 | 8 | 2 | 0.1 | 0.02 | 0.8 | 4 | 1812 |
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| SMD1812P200TF/12 | 2 | 12 | 100 | 8 | 2 | 0.1 | 0.02 | 0.8 | 4 | 1812 |
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| SMD1812P200TF/24 | 2 | 24 | 100 | 8 | 2 | 0.12 | 0.02 | 0.8 | 4 | 1812 |
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| SMD1812P200TF/16 | 2 | 16 | 100 | 8 | 2 | 0.1 | 0.02 | 0.8 | 4 | 1812 |
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| SMD1812P260TF | 2.6 | 8 | 100 | 8 | 2.5 | 0.05 | 0.015 | 0.8 | 5 | 1812 |
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| SMD1812P260TF/12 | 2.6 | 12 | 100 | 8 | 2.5 | 0.06 | 0.015 | 0.8 | 5 | 1812 |
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| SMD1812P300TF | 3 | 8 | 100 | 8 | 4 | 0.04 | 0.012 | 0.8 | 8 | 1812 |
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| SMD2018P030TF | 0.3 | 60 | 100 | 1.5 | 3 | 2.3 | 0.5 | 0.9 | 0.6 | 2018 |
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| SMD2018P050TF | 0.55 | 60 | 100 | 2.5 | 3 | 1 | 0.2 | 1 | 1.2 | 2018 |
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| SMD2018P100TF | 1.1 | 15 | 100 | 8 | 0.4 | 0.36 | 0.06 | 1.1 | 2.2 | 2018 |
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| SMD2018P100TF/33 | 1.1 | 33 | 100 | 8 | 0.4 | 0.36 | 0.06 | 1.1 | 2.2 | 2018 |
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| SMD2018P150TF | 1.5 | 15 | 100 | 8 | 0.8 | 0.17 | 0.05 | 1.1 | 3 | 2018 |
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| SMD2018P200TF | 2 | 10 | 100 | 8 | 2.4 | 0.1 | 0.03 | 1.1 | 4.2 | 2018 |
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| SMD2920P030TF | 0.3 | 60 | 100 | 1.5 | 3 | 4.8 | 0.6 | 1.5 | 0.6 | 2920 |
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| SMD2920P050TF | 0.5 | 60 | 100 | 2.5 | 4 | 1.4 | 0.18 | 1.5 | 1 | 2920 |
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| SMD2920P075TF | 0.75 | 33 | 100 | 8 | 0.3 | 1 | 0.1 | 1.5 | 1.5 | 2920 |
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| SMD2920P100TF | 1 | 33 | 100 | 8 | 0.5 | 0.41 | 0.065 | 1.5 | 2.2 | 2920 |
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| SMD2920P125TF | 1.25 | 33 | 100 | 8 | 2 | 0.25 | 0.05 | 1.5 | 2.5 | 2920 |
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| SMD2920P150TF | 1.5 | 33 | 100 | 8 | 2 | 0.23 | 0.035 | 1.5 | 3 | 2920 |
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| SMD2920P185TF | 1.85 | 33 | 100 | 8 | 2.5 | 0.15 | 0.03 | 1.5 | 3.7 | 2920 |
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| SMD2920P200TF | 2 | 16 | 100 | 8 | 4.5 | 0.12 | 0.02 | 1.5 | 4 | 2920 |
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| SMD2920P200TF/24 | 2 | 24 | 100 | 8 | 4.5 | 0.12 | 0.02 | 1.5 | 4 | 2920 |
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| SMD2920P250TF | 2.5 | 16 | 100 | 8 | 16 | 0.085 | 0.02 | 1.5 | 5 | 2920 |
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| SMD2920P260TF | 2.6 | 16 | 100 | 8 | 10 | 0.075 | 0.014 | 1.5 | 5.2 | 2920 |
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| SMD2920P300TF/6 | 3 | 6 | 100 | 8 | 20 | 0.048 | 0.012 | 1.5 | 6 | 2920 |
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| SMD2920P300TF/16 | 3 | 16 | 100 | 8 | 20 | 0.048 | 0.012 | 1.5 | 6 | 2920 |
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| SMD0603P003TF | 0.03 | 30 | 20 | 0.15 | 1 | 65 | 6 | 0.5 | 0.09 | 603 |
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