2EZ27D5/TR8

Diodes - Zener - Single

2EZ27D5/TR8 is an axial type Zener single diode with a power dissipation of 350mW at an approximate maximum ambient temperature of 50℃. It exhibits a sharp breakdown characteristics and maintains a 5.6V zener voltage. Its zener current range is up to 200mA, and its operating temperature varies between -30℃ to +85℃.

The device includes a cathode and an anode with a standard axial lead and can be mounted on a substrate or printed circuit board with a compatible 0.42 inch diameter adaptor. The leads have a chrome finish and a red/black marking. The device features a sensitive reverse breakdown zone which reduces the maximum forward voltage. This ensures that the device can work in various applications with less energy.

Application Field

2EZ27D5/TR8 is used for the protection of circuits against overvoltage in various electrical and electronic devices such as consumer electronics, telecoms, automotive, and industrial equipment. It helps reduce the cost and size of the electronics equipment by providing a precisely controlled zener voltage. It also helps prevent any large variations in forward and reverse current in the circuit for improved performance.

The diode is effective as a voltage regulator to protect circuits from voltage spikes and to provide a precisely controlled voltage output. This makes it ideal for use in low-voltage DC-DC converters, voltage reference circuits, surge suppressors, and DC motor drives. The device can also be used in frequency stabilization and power protection applications.

Working Principle

The working principle of 2EZ27D5/TR8 is based on the difference between the breakdown voltage and the normal voltage. When the voltage across the device increases above the breakdown voltage, the device starts to conduct current, allowing the excess energy in the circuit to be dissipated. The energy is discharged as heat, protecting the circuit against any overvoltage.

The zener diode is designed to operate in a reverse bias condition. It has a forward voltage which is lower than the breakdown voltage, and a reverse voltage which is higher than the breakdown voltage. The forward voltage is the voltage needed to forward bias the diode and the reverse voltage is the voltage required to reverse bias the diode. The reverse bias voltage creates a electric field which is capable of breaking down the junction between the anode and the cathode to create a zener breakdown.

The zener voltage is the voltage of the reverse breakdown which is measured across the anode and the cathode. The zener voltage is very important in protecting circuits against any overvoltage and it is controlled by the amount of current passed through the junction.

When the device is used in the protection of circuits, it works in tandem with a Zenoert or MOV (metal oxide varistor). The Zenoert or MOV provides a larger capacity for absorbing energy and also prevents any high-amplitude voltage spikes, while the 2EZ27D5/TR8 protects the circuits from small variations in voltage. The combination of these two devices creates a better overall protection.

In conclusion, 2EZ27D5/TR8 is a high-performance axial type Zener single diode with a power rating of 350mW. Its zener voltage is 5.6V and its operating temperature varies between -30℃ to +85℃. It is mainly used for the protection of circuits against overvoltage, as well as for voltage regulation and frequency stabilization. The device works by creating a zener breakdown when a reverse bias voltage creates an electric field between the anode and the cathode.