BZX84B4V3-G3-08

The BZX84B4V3-G3-08 diode is a single Zener diode, part of a large, versatile family of such devices. Zener diodes have a number of helpful applications in electronics, predominantly in the stabilization of power supplies. The BZX84B4V3-G3-08 is a particularly fast-acting device with a low thermal rating.

Overview

A Zener diode is a two-terminal semiconductor device, characterized by a reverse breakdown voltage. When forward-biased, the diode allows current to move easily in one direction, while when reverse-biased, it blocks current flow, except when the bias voltage exceeds a certain breakover voltage, known as the Zener voltage. At this point, the diode conducts current in the reverse direction.

Zener diodes are widely used in high voltage, power supply circuits. For example, a Zener diode can be connected across an output node of the power supply to ground, then biased with the same voltage as the output node. This causes the output node to be held at a reference voltage, even if transient voltage spikes or drops occur.

Another example application of Zener diodes is in transient voltage suppression, including the protection of integrated circuits from damage due to significant voltage changes. Here, the Zener diode is connected in reverse across the supply leads, and can be used to both limit the voltage swing in excess of the specified limit and dissipate any excessive power.

The BZX84B4V3-G3-08

The BZX84B4V3-G3-08 diode is designed for use in power supplies that require fast-acting, reliable regulation. It is a low-current device, rated for an operating current of 3.2 mA and an operating power dissipation of 200 mW. The Zener voltage range is between 4 and 10 V, and it is designed with an internal compensation capacitor of 400 pF (±10%).

Its fast-acting response time makes it suitable for a range of electronic applications, from protection circuits for motors to Flash memory data lines. It is suitable for use in a wide range of operating temperatures, from -65 to +175°C, with an electrically stable fan-out up to 10 diodes in parallel. The low thermal rating allows for higher ambient temperatures.

Conclusion

The BZX84B4-G3-08 Zener diode is a versatile part, designed with fast-acting, low thermal rating. Its range of applications include power supply stabilization, transient voltage suppression, and motor protection circuits. It can be used across a wide temperature range and is especially suited to applications in high temperature environments.