DIAC

（重定向自SIDAC）

Idealized breakover diode voltage and current relationships. Once the voltage exceeds the turn-on threshold, the device turns on and the voltage rapidly falls while the current increases.

The DIAC is a diode that conducts electrical current only after its breakover voltage, V_BO, has been reached momentarily. The term is an acronym of diode for alternating current.

When breakdown occurs, the diode enters a region of negative dynamic resistance, leading to a decrease in the voltage drop across the diode and, usually, a sharp increase in current through the diode. The diode remains in conduction until the current through it drops below a value characteristic for the device, called the holding current, I_H. Below this value, the diode switches back to its high-resistance, non-conducting state. This behavior is bidirectional, meaning typically the same for both directions of current.

词汇	sidac
分类	英语词汇英语翻译词典
释义	sidac 英汉-汉英词典双向开关元件;交流用硅二极管;硅对称二端开关元件词组 \| 习惯用语您要查找的是不是： sidekick n. 伙伴,插袋 sidecar n. 轻快的双轮马车；跨斗 acidosis n. 酸中毒，酸毒症；酸液过多症 Dacia n. 达契亚（今罗马尼亚中北部和西部的古王国）；达契亚（汽车品牌名） sidac abbr. 硅对称二端开关元件网络短语: sidac SIDACtor 高压触发二极管 british sidac ltd 英国双向开关元件有限公司 sidac systems ltd 区域；英国买家；地区英语百科 DIAC （重定向自SIDAC） The DIAC is a diode that conducts electrical current only after its breakover voltage, V_BO, has been reached momentarily. The term is an acronym of diode for alternating current. When breakdown occurs, the diode enters a region of negative dynamic resistance, leading to a decrease in the voltage drop across the diode and, usually, a sharp increase in current through the diode. The diode remains in conduction until the current through it drops below a value characteristic for the device, called the holding current, I_H. Below this value, the diode switches back to its high-resistance, non-conducting state. This behavior is bidirectional, meaning typically the same for both directions of current.
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DIAC