A diode is an electrical component acting as a one-way valve for current.

When voltage is applied across a diode in such a way that the diode allows current, the diode is said to be forward-biased.

When voltage is applied across a diode in such a way that the diode prohibits current, the diode is said to be reverse-biased.

The voltage dropped across a conducting, forward-biased diode is called the forward voltage. Forward voltage for a diode varies only slightly for changes in forward current and temperature, and is fixed by the chemical composition of the P-N junction.

Silicon diodes have a forward voltage of approximately 0.7 volts.

Germanium diodes have a forward voltage of approximately 0.3 volts.

The maximum reverse-bias voltage that a diode can withstand without "breaking down" is called the Peak Inverse Voltage, or PIV rating.

Kingtronics produce and sell many different kinds of diodes and rectifiers, general purpose diode M7, 1N4007, 1N5408, switching diodes LL4148, zener diodes BZV55C, fast recovery diodes etc. These diode products are widely used in LCD TV, CRT color TV sets, monitors, speakers, energy-saving lamps, microwave ovens, printers, set-top boxes, small household electrical appliances and other fields.

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