Simbología of the Diodes
The top of the arrow symbolizes the plate and the thick line of base, the cathode.
Symbols of the diodes rectifiers.

Diode Zener,
also called
tension regulator.
Diode Tunnel.

Diverse used symbols
for the representation of the diode
of variable capacity or variacap.

Diodes luminicentes LEDs.

Symbols of the Photodiode.
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