1N4689 BK

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1N4689 BK is a part of the 1N468x series of 500 mW Zener Diodes. This diode has a variety of applications, and its operation and functioning are based on principles which govern a general Zener diode. In this article, we will discuss the application field of 1N4689 BK and its working principle.

The 1N4689 BK can be used in what is known as voltage regulation circuits. In these circuits, the output voltage is maintained at a set level, even if there is a change in the input voltage. This is done by introducing a reverse-biased Zener diode in the circuit. The Zener diode conducts current when the input voltage exceeds a certain level, and the output is regulated at a set level. The 1N4689 BK Zener diode can also be used to protect circuits from over-voltage by clamping excessive voltage. In addition, the 1N4689 BK can be used in voltage reference and voltage limiter circuits.

The 1N4689 BK is a type of unidirectional Zener diode, meaning it is a two-terminal, PN junction semiconductor device. The current flow through the diode is only in one direction, from the anode to the cathode. The breakdown voltage of the diode (also known as Zener voltage) is determined by the width of the depletion region and the P-N junction materials used. The reverse voltage of the 1N4689 BK is rated at 9.1 volts, with a voltage tolerance of 5%.

When the diode is forward biased, electrons are able to cross the junction and the diode behaves like a normal diode. When the polarity is reversed, however, the electric field created by the potential difference causes the electrons in the conduction band to be attracted towards the P-N junction. This creates a current that causes the voltage across the junction to remain constant, regardless of the increase in voltage.

The operation of the 1N4689 BK Zener diode is based on the Zener effect. This effect takes place when electrons in the conduction band are accelerated towards the N side of the PN junction under reverse bias, creating a reverse current (in this case, 9.1 volts). The Zener diode is populated with heavily doped impurities which allows for greater than normal doping levels and consequently, greater reverse voltage capacities. This is the principle upon which the 1N4689 BK functions.

In summary, 1N4689 BK is a type of single Zener diode used in voltage regulation circuits, voltage reference and voltage limiters. Its operation is based on the Zener effect which takes place when the PN junction is reverse-biased. The electrons in the conduction band are accelerated towards the N side of the junction and cause a reverse current, maintaining a constant voltage across the junction. The 1N4689 BK has a reverse breakdown voltage of 9.1 volts with a 5% tolerance.

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