BZX79-C68,143

Diodes – Zener – Single

A single diode-zener is a two-terminal semiconductor device implemented as a zener diode with a single PN-junction. The pattern of doping on the semiconductor junction determines its pervasiveness. The device breakdown voltage (Vz).which is determined by the junction’s reverse bias, is by its nature a highly controllable parameter. Diodes typically feature low leakage currents, low resistances, temperature stability, and wide temperature ranges. One of the advantages of a single diode-zener over other types is that it acts as both a device and a voltage regulator.

BZX79-C68 is one of these devices. It is a single zener diode that is used in ultrasonic devices like rangefinders, to trigger small electrical circuits, and to monitor and display current on an LCD. It comes with an operating temperature range of -25 to +85°C. BZX79-C68 also has a maximum operating voltage of 68V and a nominal zener current of 1.3 mA.

The primary application field of BZX79-C68 is in a variety of monitoring applications, such as for the monitoring of current. It has the capability to adjust higher voltages to the voltages that drive circuits, LCDs, and other electronics modules. It is also used in the measurement of temperatures and to trigger small electrical circuits. Other applications and use cases increasingly take advantage of the capabilities of single diode-zener devices and the BZX79-C68 specifically.

Working Principle

The mechanism of operation of this device is an abrupt depletion of electrons and holes on the semiconductor junction. An abrupt increase in the electric field across the junction causes a breakdown during the operation. This sudden increase of electric field is caused by the very low doping level at the edge of the junction. The region of depleted electrons and holes is known as a depletion layer and forms a barrier. Due to the high electric field inside the depleted region, minority carriers are swept across it, creating a breakdown.

The BZX79-C68 also features a built-in zener rating inside its junction. When the voltage across the junction reaches this rating, it will release a very low current known as a ‘zener current’ which will trigger the device and can then be used to drive small electrical circuits. This current flow compensates for the voltage drop created by the device.

The breakdown voltage for the BZX79-C68 device is also highly controllable. The usable range of breakdown voltage is from 5.1V to 68V. By adjusting the current flow through the junction, the breakdown voltage can be precisely controlled. The temperature coefficient for the device is 0.1V per °C.

The BZX79-C68 device is an easy-to-use and cost-effective solution for a variety of monitoring applications that require high reliability, low power consumption, and wide range of operational temperatures.

Conclusion

The BZX79-C68 is a single zener diode with an operating voltage range of 5.1V to 68V. It features a built-in zener rating and a temperature coefficient of 0.1V per °C. The device can be used in a variety of monitoring applications in which high reliability, low power consumption, and a wide range of operational temperatures are required. It is an easy-to-use and cost-effective solution for the application field.