BZG04-27-M3-18

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A Zener diode is a semiconductor device with a particular breakdown voltage associated with it. When the Zener diode is forward biased, a relatively large reverse current will flow once the applied zener voltage becomes equal to the zener breakdown voltage. In other words, it conducts only in the reverse direction once the breakdown voltage is exceeded. The BZG04-27-M3-18 is a type of single Zener diode with the voltage of 18 V.

An application of the Zener diode is in the voltage stabilizer circuit where it is used to provide a stable output voltage. This circuit is made up of a regular diode, resistor and a Zener diode connected in series to the load. When the load current varies, the voltage across the load also varies. This is because of the voltage drop across the resistor, and will upset the output voltage. The Zener diode, acting as a voltage regulator, will be connected in parallel to the output. When the voltage between the load and the Zener diode becomes greater than the Zener breakdown voltage (Vz), the Zener diode will begin to conduct in the reverse direction, thereby limiting the output voltage. If the output voltage increases, the Zener diode will conduct more current and reduce the output voltage, and vice versa.

The following is the working principle of the BZG04-27-M3-18 diode. When used in the application of a voltage stabilizer circuit, this Zener diode generally has a voltage rating of 18 V. In figure 1, the Zener diode is forward biased with a conventional diode. The output voltage is applied to the anode of the diode, while the cathode is biased with a voltage source Vz. When the load current increases, the voltage across the load increases and the voltage between the anode and the cathode drops. When the voltage reaches the breakdown voltage of the Zener diode, it begins to conduct in the reverse direction and keeps the output voltage nearly constant at the breakdown voltage of the Zener diode.

The Zener diode can also be used in other applications. For example, it can be used in a voltage limiter circuit where it works to limit the voltage across the load. Another application is to provide a reference voltage to an amplifier circuit. A Zener diode can also be used as a temperature stabilizer, as its breakdown voltage is temperature dependent.

In summary, the BZG04-27-M3-18 is a single Zener diode with the voltage of 18 V, which has a wide range of applications both in the form of a voltage regulator and in other types of applications. Its working principle is based on the ability of the diode to remain in a conducting state once its breakdown voltage is exceeded, thereby keeping the output voltage nearly constant at its breakdown voltage.

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