按照居里温度分类   

    PTC热敏电阻根据居里温度的不同分为高居里温度PTC热敏电阻和低居里温度PTC热敏电阻。

    习惯上将居里温度高于120℃的PTC热敏电阻称为高居里温度PTC热敏电阻；

    居里温度低于120℃的PTC热敏电阻称为低居里温度PTC热敏电阻。

    按照应用用途分类   

                                          ☞   恒温加热用PTC热敏电阻
                                          ☞   低电压加热PTC热敏电阻
                                          ☞   空气加热用PTC热敏电阻
                                          ☞   过流保护用PTC热敏电阻
                                          ☞   过热保护用PTC热敏电阻
                                          ☞   液体加热用PTC热敏电阻
                                          ☞   延时启动用PTC热敏电阻

    按照结构特点分类   

                                               金属外壳型PTC热敏电阻
                                               外加绝缘层PTC热敏电阻
                                               焊接包封型PTC热敏电阻
                                               粘胶装配型PTC热敏电阻

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