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Littelfuse(美国力特)推出的1.5KE36CA是一款1.5kW级双向瞬态电压抑制器(TVS),专为敏感电子电路的过压防护设计,可有效抑制静电放电(ESD)、电快速瞬变脉冲群(EFT)等瞬态干扰,适用于宽温、高可靠性的工业及汽车电子场景。
1.5KE36CA属于中功率TVS二极管,核心定位是为电子系统提供瞬态过压防护,避免后级电路因电压尖峰损坏。其典型应用场景包括:
极性与截止/击穿特性
采用双向设计,无需区分正负极,安装灵活;反向截止电压(Vrwm)为30.8V,即电路正常工作时,器件反向漏电流极小(仅1μA),不影响电路功能;击穿电压(Vbr)为37.8V,当电路电压超过该值时,器件快速导通,启动钳位防护。
钳位与脉冲耐受能力
钳位电压(Vc)为49.9V,可将过压尖峰限制在安全范围内,保护后级敏感元件;峰值脉冲电流(Ipp)达30.5A,峰值脉冲功率(Ppp)为1.5kW(测试波形为10/1000μs)——10/1000μs波形指脉冲上升时间10μs、半峰值时间1000μs,符合国际TVS测试规范,可有效应对实际场景中的瞬态干扰。
宽温工作范围
工作温度覆盖**-55℃+175℃**,远超普通TVS二极管(多为-40℃+125℃),可在汽车发动机舱、工业高温烤箱等极端环境下稳定工作,可靠性突出。
封装与机械强度
采用DO-201AD通孔封装,引脚间距符合标准PCB设计,机械强度高,可承受振动、冲击等环境应力;通孔安装方式适合传统PCB布线,无需特殊焊接设备。
符合国际防护标准
满足IEC 61000-4-2(ESD) 和IEC 61000-4-4(EFT) 标准:
高可靠性设计
作为Littelfuse成熟产品线中的一员,1.5KE36CA经过严格的可靠性测试(如温度循环、振动测试),可长期稳定工作,适合对可靠性要求较高的工业及汽车领域。
PCB布局建议
应靠近被防护的端口(如电源输入、信号接口),尽量缩短器件与防护对象之间的引线长度,以降低寄生电感(寄生电感会导致钳位电压升高,影响防护效果)。
焊接要求
遵循标准通孔焊接工艺,焊接温度控制在260℃以内(持续时间不超过10秒),避免高温损坏器件内部结构。
参数匹配
选择时需确保Vrwm不低于电路正常工作电压的1.2倍,钳位电压Vc不超过后级元件的最大耐压值,以实现最佳防护效果。
1.5KE36CA凭借双向设计、宽温范围、高脉冲耐受能力及符合国际标准的防护性能,成为工业及汽车电子领域过压防护的可靠选择,可有效提升电子系统的抗干扰能力与使用寿命。
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