Thyristors

A thyristor is a type of semiconductor device that acts like a switch, allowing energy to flow in one direction only. It is a three-terminal electronic device composed of four layers of alternating P-type and N-type material that can operate in four different states: off, forward blocking, reverse blocking, and forward conducting. In its off state, the thyristor does not conduct current; in its forward blocking state, it allows current to flow in the forward direction only; in its reverse blocking state, it allows current to flow in the reverse direction only; and in its forward conducting state, it allows current to flow in either the forward or reverse direction. Thyristors can be used in many applications such as power control, over-current protection, motor speed control, and lighting dimmers.
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Littelfuse Triacs 600V 15A 50-50-50mA
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Littelfuse 647
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BTA420-800BT,127


NXP Semiconductors Triacs _3Q Hi-Com Triac
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NXP 646
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BTA330X-800BTQ


Triac; 800V; 30A; 50mA; THT; high temperature, sensitive gate; tube
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WeEn Semiconductor 646
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TN2540-600G-TR


STMicroelectronics SCRs 25 Amp 600 Volt
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STMicroelectronics 646
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BT134-600E.127


Triac; 600V; 4A; 11mA; SOT82
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NXP 646
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BTA316-600D.127


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