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SMAJ28A/TR13是台湾君耀(Brightking)推出的小型化单向表面贴装瞬态抑制二极管(TVS),核心作用是为电子电路提供快速过压防护,抵御静电放电(ESD)、雷电感应浪涌、开关切换浪涌等瞬态电压冲击,避免后端敏感元器件(如IC、传感器、MOSFET等)因过压击穿或损坏。该器件采用SMA(DO-214AC)封装,适配高密度PCB设计,适用于工作电压≤28V的各类电子设备。
SMAJ28A/TR13的参数经过精准设计,匹配28V工作电压场景的防护需求,核心参数及实际意义如下:
此为器件正常工作时可承受的最大反向直流/交流电压,即电路运行时,反向偏置电压不得超过28V(否则器件提前导通影响电路)。该参数明确了适用范围——仅适配工作电压≤28V的电路(如12V/24V系统)。
反向偏置电压达到此值时,器件进入雪崩击穿状态(TVS防护的核心原理)。31.1V的典型击穿电压确保浪涌发生时,器件能以ns级速度响应,不会因击穿电压过高导致后端元件受损。
当施加**峰值脉冲电流(Ipp=8.8A)**时,器件两端的最大电压值。45.4V远低于多数敏感IC的最大耐压(通常≤60V),能有效将浪涌电压限制在安全阈值内,避免元件击穿。
由公式 ( P_{pp}=V_c \times I_{pp} ) 验证(45.4V×8.8A≈400W),此为器件可承受的最大瞬态脉冲功率,满足多数民用/工业场景的浪涌防护需求(如雷电感应浪涌通常在几百瓦级别)。
正常工作时(反向偏置≤28V)的最大反向漏电流。仅1μA的漏电流确保器件无额外功耗损耗,不影响电路正常工作电流和效率。
SMAJ28A/TR13采用SMA(DO-214AC)表面贴装封装,具有以下优势:
结合参数特性,该器件的核心应用场景包括:
台湾君耀(Brightking)是全球知名过压保护厂商,产品符合**IEC 61000-4-2(ESD)、IEC 61000-4-5(浪涌)、AEC-Q101(汽车级)**等国际标准。SMAJ28A/TR13经过严格测试:
SMAJ28A/TR13是一款高性价比、小型化单向TVS,参数精准匹配28V以下电路防护需求,SMA封装适配高密度设计,君耀品牌保障可靠性。广泛适用于消费电子、通信、工业控制等领域,是替代同类进口器件的优质选择。
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