BZD27C18P-HE3-08

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A Zener diode is a type of semiconductor device that has a positive resistance to electrical current flowing in its normal direction of current flow. It is commonly used in applications in which it is necessary to maintain a constant voltage even when the current draw changes. The BZD27C18P-HE3-08 is a single Zener diode offering good power and temperature stability as well as good linearity.

Applications

The most common application for BZD27C18P-HE3-08 Zener diode is regulating voltage in various DC circuits. Due to its high power rating, it is often employed in power supply designs to provide the protection and regulation needed. In addition, the BZD27C18P-HE3-08 can also be used for clamping and for operating switching transistors.

Features

The BZD27C18P-HE3-08 Zener diode features a reverse breakdown voltage of 18V and maximum power dissipation of 800mW. It maintains a constant voltage under normal operating conditions, and has a small-signal capacitance of 12pF. The device is highly reliable and has very low noise, making it suitable for use in sensitive applications.

Working Principle

Zener diodes are basically PN junction diodes that have been doped with additional impurity levels, which makes them susceptible to being reverse biased. When the reverse bias voltage reaches a certain maximum voltage level, the device will breakdown and begin allowing current to flow in the reverse direction. This phenomenon is known as the Zener effect.

In the case of the BZD27C18P-HE3-08, the Zener effect kicks in when the applied reverse voltage reaches 18V, at which point the diode will begin conducting current in the reverse direction. This can be used to regulate the voltage in a circuit, as the diode will limit the voltage to the rating of the Zener diode.

Conclusion

The BZD27C18P-HE3-08 is a highly reliable single Zener diode offering good power, temperature and linearity stability. It is widely used to help regulate voltage in various DC circuits and can also be used for clamping and for operating switching transistors. Finally, the device is capable of maintaining a constant voltage through its Zener effect, kicking in when the reverse voltage reaches 18V.

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