优点：响应时间快、瞬态功率大、电容低、漏电流低、击穿电压偏差小、箝位电压较易控制、无损坏极限、体积小、易于安装，在规定的反向应用条件下，当承受一个高能量的瞬时过压脉冲时，其工作阻抗能立即降至很低的导通值，允许大电流通过，并将电压箝制到预定水平，从而有效地保护电子线路中的精密元器件免受损坏。
缺点：成本偏高
适用范围：目前已广泛应用于计算机系统、通讯设备、交/直流电源、汽车、电子镇流器、家用电器、仪器仪表 （电度表）等领域。
★瞬态抑制二级管（tvs）
smbj5.0a/ca smcj5.0a/ca p6ke6.8a/ca 1.5ke6.8a/ca
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还有：5kpxxx 系列，15kpaxxx系列；20kpaxxx系列；30kpaxxx系列。
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