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P6KE47A是东沃(DOWO)推出的一款单向瞬态抑制二极管(TVS),采用经典DO-15轴向直插封装,专为电子电路中的浪涌过压防护设计,可有效抑制雷击感应、开关瞬态、静电放电等瞬时高压,保护后端敏感元器件(如IC、MOS管、传感器等)。
P6KE47A的性能参数适配中低功率电子设备的过压防护需求,典型应用包括:
其600W的峰值脉冲功率(@10/1000us波形)足以应对大多数日常环境中的浪涌冲击,无需额外配置大功率防护器件,兼顾防护效果与成本。
P6KE47A的参数经过严格测试,核心指标可满足主流电路的防护要求:
极性与截止/击穿特性
采用单向导通设计(仅抑制反向过压),正常工作时的反向截止电压(Vrwm)为40.2V——即电路正常电压低于40.2V时,TVS处于截止状态,不影响电路功耗;当反向电压超过击穿电压(44.65V) 时,TVS会快速击穿导通,将过压钳位在安全范围。
钳位与脉冲承载能力
击穿导通后的钳位电压为64.8V——这是过压被限制的最高电压,需确保后端元器件的最大耐压高于该值(如常见IC耐压70V以上即可适配);
峰值脉冲电流(Ipp)为9.26A,结合600W峰值脉冲功率(Ppp=600W@10/1000us波形),可有效承载瞬时浪涌电流,避免器件烧毁。
反向漏电流
正常截止状态下的反向漏电流(Ir)仅1uA,远低于普通二极管的漏电流,不会造成电路额外功耗,适合低功耗设备使用。
P6KE47A采用DO-15轴向直插封装,具备以下优势:
电路结构:将P6KE47A反向并联在电源正极(+V)与地(GND)之间(TVS阴极接+V,阳极接GND);
工作原理:当电源出现浪涌(如雷击感应导致电压升至50V以上),TVS击穿导通,将电压钳位在64.8V左右,保护后端IC等元件。
电路结构:在RS485/CAN总线的每根信号线(如A、B线)与地之间并联P6KE47A(反向接法);
工作原理:抑制总线中的静电放电(ESD)与浪涌脉冲,避免接口芯片损坏。
注意:单向TVS仅能防护一个方向的过压(如电源正到地),若需双向防护需选择双向TVS(如P6KE47CA)。
选型匹配:
安装要点:
环境注意:
P6KE47A作为一款性价比突出的单向TVS,凭借稳定的防护性能与便捷的封装设计,成为众多电子设备过压防护的常用选择,可有效降低电路因浪涌损坏的风险,提升设备可靠性。
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