Thyristor, Triac and Diac Symbols
Thyristors - SCR, are semiconductors that are activated when an impulse is applied and deactivated when they do not receive the switching current. They handle high power. Triac and diac are bidirectional semiconductor devices.
| Symbol | Description | Symbol | Description | |
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Thyristor SCR Silicon Controlled Rectifier + Info |
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Thyristor SCS / Thyristor Tetrode Silicon Controlled Switch |
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Fourth layer PNPN Schottky thyristor |  |
Fourth layer PNPN Schottky thyristor | |
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Fourth layer PNPN Schottky thyristor |  |
Reverse conducting thyristor, P channel gate controlled by cathode | |
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Reverse conducting thyristor, N channel gate controlled by anode |  |
Turn-off conducting thyristor, P channel gate controlled by cathode | |
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Turn-off conducting thyristor, N channel gate controlled by anode |  |
Photo-Thyristor | |
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Diac Generic symbol + Info |
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Diac | |
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Diac |  |
Trigger Diac Tree layer Diac |
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Triac Triode for Alternating Current + Info |
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SIDAC Silicon Diode for Alternating Current + Info |
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SBS Silicon bilateral switch |
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SUS Silicon unilateral switch |
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Ditriac / Quadrac + Info |
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Darlistor | |
Picture gallery of thirystors, triacs and diacsDownload symbols |
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