Thyristors

Thyristors

A thyristor is a solid-state semiconductor device composed of a four-layer p-n-p-n structure that operates as a bistable switch. Once triggered—typically by a small gate current—it allows current to flow between the anode and cathode and continues to conduct as long as it remains forward-biased. Thyristors are especially valued in power electronics for their ability to handle high voltages and currents efficiently. They are widely used in applications such as AC and DC motor drives, power supplies, light dimmers, and voltage regulation systems. The most recognized type is the Silicon Controlled Rectifier (SCR), ideal for circuits requiring precise control of power, particularly in unidirectional and high-power environments. There are four main types of thyristors, each suited to specific applications: SCR (Silicon Controlled Rectifier): A unidirectional thyristor that turns on when a gate pulse is applied and stays on as long as the current remains above a holding level. Ideal for DC motor drives, controlled rectifiers, and high-power switching. TRIAC (Triode for Alternating Current): A bidirectional thyristor that can conduct in both directions, commonly used in AC power control applications such as light dimmers, fan speed controllers, and domestic appliances. DIAC(Diode for Alternating Current): A bidirectional trigger device without a gate, used to trigger TRIACs by breaking down at a specific voltage threshold. Often found in timing and phase control circuits. SIDAC (Silicon Diode for Alternating Current): Similar in function to the DIAC but capable of handling higher voltages and currents. Typically used in overvoltage protection and high-energy pulse circuits. When choosing a thyristor, it\'s crucial to consider factors such as whether the application is AC or DC, the need for bidirectional vs. unidirectional conduction, the required voltage and current ratings, and the triggering method. This ensures optimal performance, longevity, and safety in your power control design.

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Select productsMfrDescriptionPackageSupplier Device PackageMounting TypeSeriesOperating Temperature
Z0109NN6AA4
Z0109NN6AA4
$0.45000
STMicroelectronicsTRIAC SENS GATE 800V 1A SOT223Tape & Reel (TR),Cut Tape (CT)SOT-223Surface Mount--40°C ~ 125°C (TJ)
Z0109SN 5AA4
Z0109SN 5AA4
$0.09000
STMicroelectronicsTRIAC SENS GATE 800V 1A SOT223Tape & Reel (TR)SOT-223Surface Mount--40°C ~ 125°C (TJ)
Z0110DN 5AA4
Z0110DN 5AA4
$1.22000
STMicroelectronicsTRIAC 400V 1A SOT223Tape & Reel (TR),Cut Tape (CT)SOT-223Surface Mount--40°C ~ 125°C (TJ)
Z0110MA 1AA2
Z0110MA 1AA2
$0.08000
STMicroelectronicsTRIAC 600V 1A TO92-3BulkTO-92-3Through Hole--40°C ~ 125°C (TJ)
Z0110MA 2AL2
Z0110MA 2AL2
$0.21000
STMicroelectronicsTRIAC 600V 1A TO92-3Tape & Box (TB)TO-92-3Through Hole--40°C ~ 125°C (TJ)
Z0110MN 5AA4
Z0110MN 5AA4
$0.48000
STMicroelectronicsTRIAC 600V 1A SOT223Tape & Reel (TR),Cut Tape (CT)SOT-223Surface Mount--40°C ~ 125°C (TJ)
Z0110NA 1AA2
Z0110NA 1AA2
$0.26000
STMicroelectronicsTRIAC 800V 1A TO92-3BulkTO-92-3Through Hole--40°C ~ 125°C (TJ)
Z0110SN 5AA4
Z0110SN 5AA4
$0.09000
STMicroelectronicsTRIAC SENS GATE 800V 1A SOT223Tape & Reel (TR)SOT-223Surface Mount--40°C ~ 125°C (TJ)
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