Diode

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What is a Diode?

“Di “= Two, and “Ode “= Electrodes i.e a device or component having two electrodes viz Anode “+” (P) and Cathode “-” (N).

A diode is a two-terminal unidirectional power electronics device. The semiconductor diode is the first invention in a family of semiconductor electronics devices. After that many types of diodes are invented. But today also the most commonly used diode is a semiconductor diode.

Generally, silicon is used to make a diode. But another semiconductor material like germanium or germanium arsenide is also used.

A diode allows current to flow only in one direction and it blocks the current in another direction. It offers low resistance (ideally zero) in one direction and it offers a high resistance (ideally infinite) in another direction.

Symbol of Diode

Diode Symbol

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