Türistoride

Türistoride, commonly known as thyristors, are a class of semiconductor devices that act as bistable switches. They are essentially diodes that can be triggered into conduction by a gate signal. Once triggered, a thyristor remains in its conducting state even if the gate signal is removed, as long as the current flowing through it exceeds a certain threshold called the holding current. To turn off a thyristor, the current must be interrupted or reduced below the holding current.

The most common type of thyristor is the Silicon Controlled Rectifier (SCR). SCRs are primarily used for controlling high-power AC circuits. They can be used in applications such as motor speed control, light dimming, and power supply regulation. Due to their ability to switch large currents and voltages, thyristors are essential components in many industrial and power electronics systems.

Thyristors have four layers of semiconductor material, forming alternating p-type and n-type regions. This structure allows them to block current in both directions until triggered. The triggering process involves applying a small positive voltage to the gate terminal relative to the cathode. Once conducting, a thyristor exhibits a very low on-state voltage drop, making it an efficient switch. Their robustness and reliability have made them a staple in power electronics for decades.