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SMAJ130CA-TR 是意法半导体(ST)提供的一款双向瞬态电压抑制器(TVS),封装为 SMA(DO-214AC),并以卷盘(-TR)形式供货,便于自动贴片组装。器件专为快速吸收静电放电(ESD)和电源/信号线上短时浪涌而设计,能在瞬态过电压发生时将电压钳位在安全范围内,保护下游电路免受损坏。
作为双向 TVS,SMAJ130CA 在正常工作时表现为高阻抗,漏电小;当线路出现超过器件击穿电压的正负瞬态时,器件进入雪崩导通状态,迅速导通并将瞬态能量钳位到指定钳位电压,从而保护被保护设备。双向结构适合交流或互换极性的线路防护,安装时无需考虑极性方向。
SMA(DO-214AC)封装具有良好的散热能力和较高脉冲承受能力,适合中等功率浪涌保护应用。型号后缀 -TR 表示以卷盘包装供货,兼容自动贴片与回流焊工艺,便于批量制造。为保证焊接质量,应参照厂家回流曲线及焊膏规范。
(注:由于 Vrwm=130 V,适用于稳态电压低于或等于此值的线路,选型时确保正常工作电压低于器件额定 Vrwm,并考虑电压裕量。)
器件工作温度范围宽(-55 ℃ 至 +150 ℃),适合恶劣环境下长期使用。符合 IEC 61000 系列浪涌/静电/快速瞬变测试要求,能为工业级和通信级设备提供稳健的瞬态保护。实际应用中还应关注PCB散热、重复冲击下的老化与热循环可靠性。
总结:SMAJ130CA-TR 是一款适用于中高工作电压线路的双向 TVS,具备良好的脉冲能量吸收能力与工业级环境适应性,适合用于需要应对 ESD、EFT 与浪涌冲击的保护场合。选型时应综合考虑工作电压、钳位电压以及被保护设备的耐压和能量承受能力。
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