1N2814B

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A Zener diode is a particular type of diode that is designed to allow current to flow in the reverse direction, but remain in a state of reverse breakdown when the reverse voltage is within a certain pre-specified range. The 1N2814B is a Part Number often used in electronics to refer to a family of small signal Diode-Zener - Single. This article is set to explore the application field of the 1N2814B as well as the working principle of the diode.

Application Field of the 1N2814B

The 1N2814B’s primary application field is, in fact, as a voltage regulator. This is because the zener voltage of the device remains almost constant, even though the current is varied. The 1N2814B is thus often used as a combined voltage regulator and clamping device.

The device also provides protection to circuits from the alternative transient voltage surges. The 1N2814B is often used alone or in combination with Diodes to form a dual diode protection circuit.

At a low zener current, the 1N2814B is particularly effective against voltage transients due to radio frequency and electromagnetic transients such as those generated when a load is switched off or during a high voltage arc over. The 1N2814B can also play an important role as an overvoltage protector in many commercial as well as industrial applications.

Working Principle of the 1N2814B

The working principle of the 1N2814B is the same as that of any other Zener diode. The Zener diode is like a standard diode except that it allows electrons to flow in reverse direction. In the forward direction, a Zener will generally act as though it were an ordinary diode. Since it tolerates a reverse voltage, Zener Diodes are widely used in voltage regulation.

When the voltage across the Zener Diode is greater than the Zener Breakdown Voltage (Vz), it will enter a reverse breakdown condition. That is, current will flow from the cathode to anode and the voltage across the diode will reach the reverse breakdown voltage Vz, which is generally is between 5 Volts and 15 Volts for the series of Zener Diodes using the 1N2814B Part Number. This Zener voltage also remains almost constant irrespective of the diode current.

In the reverse direction, the 1N2814B behaves like an ordinary diode. Its rating depends upon the application, but in general the device is designed to provide a current flow between 0.1A and 0.5A. The maximum power dissipation also generally varies from 200mW to 500mW.

Conclusion

In conclusion, the 1N2814B diode is a Zener diode with a Zener Breakdown Voltage range of between 5V and 15V. Its major use is as a voltage regulator and over-voltage protection. The device can also be used as a clamping device in combination with a standard diode or as a dual diode protection circuit. The working principle of the 1N2814B is the same as any other Zene

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