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Diode Symbols

The diode is a semiconductor device that allows the current to flow in one direction only. It has two electrodes called anode or plate and cathode, it uses the rectifying properties of the union between type P and N materials of a semiconductor.
This symbols can be represented inside a circle.

Symbology of Diodes

Symbol Description Symbol Description
Diode symbol, generic symbol Diode (rectifier diode)
Generic symbol
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  Diode symbol Diode (rectifier diode)
Generic symbol
Diode symbol Diode (rectifier diode)   Zener diode symbol Zener diode
Generic symbol
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Zener diode symbol Zener diode   Zener diode symbol Zener diode
Zener diode symbol Zener diode   Zener diode symbol Zener diode
Pin diode symbol Pin diode
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  Pin diode symbol Pin diode
Tunnel diode symbol Tunnel diode
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  Tunnel diode symbol Tunnel diode
Tunnel rectifier diode symbol Tunnel rectifier diode   SRD / Snap diode symbol Snap diode / SRD
Step Recovery Diode
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Varactor / Varicap diode symbol Varicap diode / Varactor / Tunnig diode
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  Varicap diode symbol Varicap diode / Varactor / Tunnig diode
Varicap diode symbol Varicap diode / Varactor   Variable voltage diode symbol Variable voltage diode
Schottky diode symbol Schottky diode
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  Schottky diode symbol Schottky diode
Voltage suppressor diode symbol Transient voltage suppression diode
Voltage suppressor diode
Thyrector / TVS diode
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  Voltage suppressor diode symbol Transient voltage suppression diode
Voltage suppressor diode
Thyrector / TVS diode
Constant Current diode symbols Constant current diode
Current-limiting diode - CLD
Current-regulating diode - CRD
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  Thermal diode / Temperature sensitive diode symbol Temperature sensitive diode
Thermal diode
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Laser diode symbol Laser diode
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  Magnetically sensitive diode symbol Magnetically sensitive diode
Photo-Diode / Photodiode symbol Photo-diode / Photodiode
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  Símbolo del foto-diodo bidireccional Bidirectional photo-diode
Photo-diode common cathode symbol Photo-diode common cathode   Photo-diode common cathode symbol Photo-diode common cathode
LED symbol Light-emitting diode - LED
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  LED bicolor symbol Light-emitting diode - LED
Bicolor, depends on the polarity
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Display LED, 7 segments symbol Display LED, 7 segments
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  LED display, alphanumeric symbol LED display, alphanumeric
e.g. letter A
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NPN breakdown diode symbol NPN breakdown diode   PNP breakdown diode symbol PNP breakdown diode
Triode PNPN symbol Triode PNPN
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Bridge Rectifier Symbols

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Graetz bridge / Diode bridge symbol Graetz bridge / Diode bridge
Double wave rectifier bridge with 4 Diodes
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  Graetz bridge symbol Graetz bridge
Double wave rectifier bridge with 4 Diodes
Full-wave rectifier stage Full-wave rectifier stage   Adjustable single-phase rectifier Adjustable single-phase rectifier
Three-phase rectifier symbol Three-phase rectifier
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  Adjustable three-phase rectifier Adjustable three-phase rectifier
Picture gallery of diodes
Symbol download
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