A2106UA thyristor Series

littelfuse

The A2106UA series from Littelfuse includes both SIDAC and SIDACTOR components, designed for applications requiring high-voltage triggering and protection. These thyristors are commonly found in systems that need precise control over electrical circuits, such as AC motor drives, power supplies, and surge protection circuits. SIDACs (Silicon Controlled Alternating Current Switches) are particularly useful in AC systems where you need to trigger a circuit at specific points in the AC waveform. They’re often used in phase control applications, where controlling the firing angle of a thyristor can regulate the output voltage or current. Engineers tend to reach for SIDACs when they need reliable triggering without the need for complex synchronization circuits. SIDACTORS, on the other hand, combine the functionality of a SIDAC with a built-in RC snubber network, which helps to suppress voltage spikes and improve the overall performance and reliability of the circuit. This makes them ideal for applications where transient voltage events are common, such as in surge protection systems or in industrial control panels. One practical observation is that these components can significantly redu