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Diode Manufacturing Company

Diode Manufacturing Company

A diode rectifier is a semiconductor device that rectifies alternating current from a commercial power supply in a power supply circuit to obtain a pulsating current.

Rectifier diodes are characterised by their large size, high current capacity, high voltage withstand and rugged construction compared to normal small signal diodes.



Diode Manufacturing Company

Principle of diode rectifier

In a diode rectifier, the P-type terminal side is called the anode and the N-type terminal side is called the cathode. Near the PN junction, the N-type electrons and P-type holes cancel each other to form a depletion layer. When a forward voltage is applied between the anode and cathode, holes are injected into the P-type region and electrons are injected into the N-type region, thereby narrowing the depletion layer and allowing current to flow from the P-type to the N-type.

When a reverse voltage is applied, electrons are injected into the P-type region and holes are injected into the N-type region, resulting in a widening of the depletion layer and no current flow. This shows that in a diode, current flows only in the direction of P-type to N-type.


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