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Brightking(台湾君耀)SA16CA/B是一款双向瞬态抑制二极管(TVS),核心功能是吸收电路中的瞬态过压脉冲(如雷击、开关浪涌、静电放电),保护敏感电子元件免受损坏。该器件针对中低电压电路设计,典型应用场景包括:
SA16CA/B的关键参数直接决定防护能力,以下是参数的实际意义:
极性:双向
无需区分正负极,可直接并联在信号/电源线路两端,适配双向传输电路(如USB数据线、双向通信总线)。
反向截止电压(Vrwm):16V
电路正常工作时TVS反向不导通的最大电压。建议电路最大工作电压≤15V(留1V余量),避免误触发影响正常供电。
钳位电压:26V
瞬态过压时,TVS快速击穿导通,将线路电压钳位在26V以内,是保护后端IC的核心指标(需确保IC耐压≥26V)。
峰值脉冲电流(Ipp):19.6A@10/1000μs
10/1000μs脉冲波形(上升沿10μs、半高宽1000μs)下,TVS能承受的最大峰值电流,对应行业标准浪涌测试。
峰值脉冲功率(Ppp):500W@10/1000μs
由钳位电压与峰值电流决定(26V×19.6A≈509.6W,公差内标称500W),是判断防护能力的核心指标。
击穿电压:17.8V
反向击穿的典型电压,比Vrwm高1.8V,是“正常工作→防护启动”的临界点,确保16V以内稳定工作。
反向漏电流(Ir):1μA@Vrwm
正常工作时漏电流极小,不影响电路静态功耗,适合便携设备。
SA16CA/B采用Axial(轴向引线)封装,优势显著:
注意:替代需确认封装、脉冲波形标准(10/1000μs vs 8/20μs),避免防护不匹配。
SA16CA/B是一款高性价比双向TVS管,针对中低电压电路浪涌防护优化,轴向封装适配传统PCB设计,参数稳定可靠。广泛应用于消费电子、通信、工业等领域,是敏感电路防护的常用选型。
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