2EZ120D5 Datasheet/PDF2EZ120D5 is a single Zener diode. It is mainly used in applications where a high precision, low power Zener diode is required. It also has applications in voltage stabilizing, voltage rectifying and voltage regulating.
A Zener diode consists of a semiconductor junction just like an ordinary diode, but operated in reverse bias mode. When the voltage across a normal diode reaches a certain value, it breaks down and the current increases drastically. In a Zener diode, however, due to its much higher resistivity in reverse bias, the reverse breakdown voltage is much higher than that of a normal diode and the current increases much more slowly.
The breakdown voltage, Vz, is the voltage applied across the Zener diode for which the current flow will be specified. The 2EZ120D5 Zener diode has a Vz of 120V. This is the voltage at which the diode will begin to conduct and remains so until the breakdown voltage is exceeded. The diode has a maximum power rating at the Vz of 500mW, and a maximum reverse voltage of 125V.
The 2EZ120D5 is ideal for applications such as over-voltage protection, regulation of a DC power supply, voltage reference and also for use in many circuits where a constant voltage source is required. The 2EZ120D5 also offers excellent temperature coefficient over a wide range of temperature.
The working principle of a Zener diode is similar to that of a normal diode except for the fact that the Zener diode is reverse biased instead of forward bias. When the reverse bias voltage applied is less than the Zener voltage (Vz), no current will flow and the diode is said to be OFF. When the reverse bias voltage reaches or exceeds the Zener voltage (Vz), a large current will flow and the diode is said to be ON.
The 2EZ120D5 is used in a variety of applications which require a stable voltage source. Examples include power supplies for computer boards, overvoltage protection for integrated circuits, voltage regulation and voltage reference.
In summary, 2EZ120D5 is a single Zener diode which has a Vz of 120V, maximum power rating of 500mW and a maximum reverse voltage of 125V. It is mainly used in applications such as over-voltage protection, regulation of a DC power supply, voltage reference and also for use in many circuits where a constant voltage source is required. Its working principle is similar to that of an ordinary diode except for the fact that it is reversed biased.