瞬態(tài)抑制二極管(TVS)又叫箝位型二極管，是目前國際上普遍使用的一種高效能電路保護(hù)器件，它的外型與普通二極管相同，但卻能吸收高達(dá)數(shù)千瓦的浪涌功率。 它的主要特點(diǎn)是在反向應(yīng)用條件下，當(dāng)承受一個(gè)高能量的大脈沖時(shí)，其工作阻抗立即降至極低的導(dǎo)通值，從而允許大電流通過，同時(shí)把電壓箝制在預(yù)定水平，其響應(yīng)時(shí)間僅為10-12毫秒，因此可有效地保護(hù)電子線路中的精密元器件。 TVS允許的正向浪涌電流在TA＝250C，T＝10ms條件下，可達(dá)50～200A。 雙向TVS可在正反兩個(gè)方向吸收瞬時(shí)大脈沖功率，并把電壓箝制到預(yù)定水平，雙向TVS適用于交流電路，單向TVS一般用于直流電路。可用于防雷擊、防過電壓、抗干擾、吸收浪涌功率等，是一種理想的保護(hù)器件。

★瞬態(tài)抑制二級(jí)管（TVS）
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