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 SCRs 4A 200uA 600V Sensing
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10mA 5mA 600V Two-way thyristor TO-220 Thyristors (SCR)/Modules ROHS
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Triac; 600V; 16A; 35/70mA; THT; sensitive gate; 4Q; tube; TO220FP
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Triac; 600V; 16A; 70mA; SOT186A
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NXP 704
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