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5.0SMDJ36A是江苏长电科技(CJ) 推出的单向瞬态抑制二极管(TVS),专为低压电子系统的浪涌/静电过压防护设计。该器件采用SMCG表面贴装封装,属于5.0SMDJ系列的典型型号,核心作用是在电路遭遇瞬态过压时快速响应,将电压钳位至安全范围,避免后级敏感元件(如芯片、传感器)损坏。
TVS的防护能力由核心参数决定,5.0SMDJ36A的参数设计针对性强,适配多数低压场景:
36V(最大值),指器件正常工作时可承受的最大反向直流电压。电路正常运行时,该电压需高于系统额定电压(如24V电源系统),确保TVS不导通、无额外功耗。
40V(典型值),是TVS反向击穿的起始电压,略高于Vrwm(36V)。该设计保证:正常工况下TVS处于截止状态,仅在浪涌电压超过40V时快速击穿,启动防护。
86.1A,由Ppp与Vc推导得出(5000W ÷ 58.1V ≈ 86.1A),是TVS可承受的最大浪涌电流,是评估防护能力的核心指标之一。
5μA(最大值),远低于常规TVS的漏电流水平(通常≤10μA)。该特性确保器件在正常反向偏置时功耗极低,不影响电路效率与稳定性。
江苏长电科技是国内半导体封装测试龙头企业,TVS产品系列覆盖全功率段(从低功率ESD防护到高功率浪涌防护),符合RoHS、REACH等环保标准,广泛应用于消费电子、工业控制、通信等领域,质量可靠性经市场长期验证。
5.0SMDJ36A的参数适配多种低压电子系统,核心应用场景包括:
手机、平板、笔记本电脑的电源输入端口、USB接口,防护静电放电(ESD)与电源浪涌对主板芯片的损坏。
PLC模块、传感器节点、电机驱动电路的电源/信号端口,应对电网瞬态浪涌(如开关切换、雷击感应)。
路由器、交换机、光模块的信号链路与电源端口,防护静电及通信线路浪涌。
12V系统的辅助电路(如车载充电器、仪表盘),防止过压冲击对敏感元件的影响。
为确保防护效果,需注意以下要点:
Vrwm需大于电路正常工作电压(如24V系统选36V Vrwm的器件),避免正常工况下漏电流过大。
需根据电路可能出现的最大浪涌功率选择,5.0SMDJ36A的5kW峰值功率可覆盖多数低压场景;若浪涌功率更高,可并联多个器件(注意均流设计)。
5.0SMDJ36A为单向TVS(后缀“A”表示单向),需反向并联于被保护电路(阴极接高压端,阳极接低压端)。
尽量靠近被保护端口,缩短引线长度,减少寄生电感(寄生电感会降低钳位效果)。
工作温度范围通常为-55℃~150℃,满足工业与消费电子的环境要求。
5.0SMDJ36A凭借紧凑封装、高防护能力、低漏电流的特性,成为低压电子系统过压防护的高性价比选择,适合对空间与可靠性有要求的设计场景,可有效降低电路因浪涌/静电导致的故障风险。
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