3EZ18D5E3/TR8

Diodes - Zener - Single includes 3EZ18D5E3/TR8, a special type of diode with a wide range of applications. This diode is constructed with a junction between two different types of semiconductor material, designed to allow current to flow in one direction while blocking the reverse flow. It is often used in voltage-regulating applications, where excess voltage must be diverted.

Specifications

3EZ18D5E3/TR8 has a forward voltage drop of 1.5V and maximum reverse breakdown voltage of 18V. Its maximum reverse leakage current is 5mΑ, maximum power dissipation is 500ΜW, and storage temperature range is -65 to +150℃. It is provided in DO-35 glass axial package.

Application Fields

Zener diodes like 3EZ18D5E3/TR8 can be used in a wide range of applications, most of which are related to voltage regulation or voltage redirecting. For example, they can be used in a voltage regulator circuit, where it can act as a voltage-limiting device. This can be used in power supplies, battery chargers, and other circuits, where they can protect components from excessively high voltages.

Zener diodes can also be used as voltage-clamping devices in circuits. This is particularly useful in lightning protection applications, where the diode will absorb and redirect the energy from the lightning strike, thus preventing damage to the circuit. They can also be used as voltage dividers, where the current can be divided into multiple outputs, depending on the resistance and voltage of the connected resistors.

Working Principle

Zener diodes are based on the principle of reverse breakdown. This is when the reverse voltage across the diode reaches the breakdown voltage, resulting in a large current that flows through the diode. This allows the current to be diverted in the opposite direction, bypassing the forward voltage drop of the diode.

When the reverse voltage across the diode exceeds the breakdown voltage, the diode can be considered to be “on”, allowing current to flow in the reverse direction. This current will be limited by the diode’s maximum power dissipation, in order to protect the diode from any damage.

When the reverse voltage falls back below the junction threshold, the diode will become “off”, and the current will be diverted back in the forward direction. This helps to maintain the voltage levels in the circuit and prevent components from being damaged due to high voltages.

Conclusion

3EZ18D5E3/TR8 is a type of Zener diode, which is designed to be used in voltage regulating and voltage redirecting applications. It has a forward voltage drop of 1.5V and maximum reverse breakdown voltage of 18V, and a maximum reverse leakage current of 5mΑ. Its working principle is based on the reverse breakdown effect, which allows current to be diverted in the reverse direction.