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Symbols of Thyristors, Triacs and Diacs

The Thyristors are semiconductors of four caps that are activated by the application of an impulse and are deactivated by not being supplied with the current for them to work. They handle big powers. They are recognized by the English initials SCR. The triac and diac are bidirectional semiconductor devices.

Symbology of Thyristors, Triacs and Diacs

Symbol Description Symbol Description
SCR Thyristor symbol Thyristor SCR
Silicon Controlled Rectifier
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  SCS thyristor symbol Thyristor SCS / Thyristor Tetrode
Silicon Controlled Switch
Fourth layer PNPN Schottky thyristor symbol Fourth layer PNPN Schottky thyristor   Fourth layer PNPN Schottky thyristor symbol Fourth layer PNPN Schottky thyristor
Fourth layer PNPN Schottky thyristor symbol Fourth layer PNPN Schottky thyristor   Symbol of Reverse conducting thyristor, P channel gate controlled by cathode Reverse conducting thyristor, P channel gate controlled by cathode
Symbol of Reverse conducting thyristor, N channel gate controlled by anode Reverse conducting thyristor, N channel gate controlled by anode   Symbol of Turn-off conducting thyristor, P channel gate controlled by cathode Turn-off conducting thyristor, P channel gate controlled by cathode
Symbol of Turn-off conducting thyristor, N channel gate controlled by anode Turn-off conducting thyristor, N channel gate controlled by anode   Photo thyristor symbol Photo-Thyristor
Diac symbol Diac
Generic symbol
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  Diac symbol Diac
Diac symbol Diac   Trigger diac symbol Trigger Diac
Tree layer Diac
Triac symbol Triac
Triode for Alternating Current
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  SIDAC symbol SIDAC
Silicon Diode for Alternating Current
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SBS symbol SBS
Silicon bilateral switch
  SUS symbol SUS
Silicon unilateral switch
Ditriac / Quadrac symbol Ditriac / Quadrac
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  Darlistor symbol Darlistor
Picture gallery of thirystors, triacs and diacs
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