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Brightking(台湾君耀)作为专注过压保护元器件的老牌厂商,其301KD05属于径向引线式压敏电阻系列,核心定位为中低压电路的浪涌防护元件,适用于家电、工业控制、小型电子设备等场景的过压保护需求,兼具可靠性与性价比。
301KD05的关键参数直接决定防护能力与适用范围,各参数意义如下:
压敏电阻的核心阈值参数,指测试电流0.1mA时的电压值——当电路电压超过300V时,压敏电阻电阻急剧下降(从兆欧级降至欧姆级),快速导通泄放浪涌电流,避免被保护元件因过压损坏。需注意:此值为“导通阈值”,并非长期工作电压。
在8/20μs浪涌电流波形(模拟雷击或开关浪涌的典型波形)下,当浪涌电流达到峰值时,压敏电阻两端的电压上限。该参数直接决定被保护电路的耐压要求——若电路元件耐压低于520V,需搭配TVS管进一步钳位。
压敏电阻的固有电容,对高频信号有一定影响。85pF属于中等水平,适合电源电路防护(对高频信号影响小),但需避免用于对电容敏感的射频电路。
长期工作时的功耗,数值极小,不会对电路正常运行产生额外功率负担。
301KD05采用径向引线封装,具备以下优势:
结合参数特性,301KD05的常见应用包括:
Brightking 301KD05作为一款中低压径向引线压敏电阻,以300V压敏电压、520V钳位电压、800A浪涌电流等参数,适配多场景过压防护需求,兼具可靠性与安装便捷性,是家电、工业控制等领域的实用防护元件。
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