2EZ4.7D/TR12

Zener diodes are a type of diode that allow current to flow in the forward direction just like a normal diode, however the diodes will also allow current to flow in the reverse direction when the voltage is greater than the breakdown voltage. This voltage is normally referred to as the Zener voltage. The 2EZ4.7D/TR12 Zener diode is a single diode with a reversion voltage of 4.7V and is widely used as an voltage regulator, in Voltage Multipliers, as a Voltage regulator or in High Voltage RF applications.

Applications

The 2EZ4.7D/TR12 Zener diode is mainly used as a voltage regulator in applications such as radio frequency (RF), consumer electronics, automotive, telecommunications, industrial automation and medical equipment. The diode can be used in devices that require low voltages, such as LEDs and digital electronics, as well as high voltage circuits, such as RF transmitters, power supplies and motor drives. The diode can be used in series to provide a regulated output voltage, or in parallel with a load to provide short circuit protection. Additionally, the diode can be used as part of a voltage multiplier chain in power supplies, to boost the input voltage. Additionally, the diode can be used in high voltage RF applications in order to achieve greater current densities.

Working Principle

The Zener diode works by having two pn-junctions back to back. This sextuple structure works to give the diode its high breakdown voltage. The current is allowed to flow through the diode in the forward direction when the voltage across the diode is less than the Zener voltage. The diode will then reverse biased when the voltage increases beyond the Zener voltage, allowing current to flow in the reverse direction. The current then flows until the voltage reaches the breakdown voltage, at which point the current will stop flowing and the diode will remain reverse biased.

When the diode is reverse biased and the voltage across the diode increases, the current starts to flow, this is known as the Zener region. In this region the current is limited to a maximum current, which is known as the Zener current. The Zener current is set by the manufacturers and is parameterized for every individual part. The Zener current is a key parameter as it determines how much power will be dissipated by the diode, as well as the stability of the circuit and the output voltage. This is why it is so important to select the correct device for the application.

Conclusion

The 2EZ4.7D/TR12 Zener diode is a single diode with a breakdown voltage of 4.7V and is used as a voltage regulator and in Voltage Multipliers, as a Voltage regulator or in High Voltage RF applications. The diode is able to control the flow of current in both the forward and reverse directions and the current is limited to a maximum when the voltage increases beyond the Zener voltage. This makes it ideal for applications such as radio frequency (RF), consumer electronics, automotive, telecommunications, industrial automation and medical equipment.