V18ZT3PX2855

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

TVS - Varistors, MOVs, are devices that protect electric circuits against short voltage and current spikes. The V18ZT3PX2855 is a Transient Voltage Suppressing Diode, a specific type of these devices. A circuit incorporating the V18ZT3PX2855 has several potential applications and its working principle can be broken down to understand its uses.

Application Field

The V18ZT3PX2855 has the ability to suppress lightning-induced transients up to one thousand volts. This means it can offer protection to delicate electronic equipment such as computers, medical devices, resistors connected to power supplies, and touch-screen displays. As well as transient voltage events, it can also be used to guard against continuously increasing overvoltage, with the capacity to regulate the current flow and protect from electrical overloads.

Elsewhere, it can also be used to prevent destruction from overcurrent in the power lines of airplanes, a practice that has already been utilized with satisfied results. The diode can also be used for surge protection on data and signal lines, helping to create an immunity for them against contact with electricity.

Working Principle

At the heart of the V18ZT3PX2855 is a semiconductor junction, which requires three basic parts for it to function properly: the anode, the cathode, and the dielectric. The dielectric material is made up of two distinct bodies, the P-type (positive) and the N-type (negative). When surge or voltage increases occur, the two types of material interact producing a voltage across the junction that the diode can use to regulate the current that is being discharged.

The anode and the cathode are attached to two resistors, both of which have a specific resistance capability. The anode electrode is connected to the positive side of the diode, while the cathode is connected to the negative side. When the voltage across the junction is increased, a voltage difference is created between the two electrodes, causing a current to flow through the resistance of the anode and the cathode. This current regulates the voltage and prevents it from exceeding the set limit.

When the voltage across the junction exceeds the protection threshold, the V18ZT3PX2855 will conduct the charge and dissipate it back to the surface of the device. This is done without disrupting the protection characteristics of the device. Furthermore, as the voltage increases, the tolerance of the diode increases accordingly. This means it is able to protect against surges and overvoltages with higher intensity as the voltage gets higher.

The specific data is subject to PDF, and the above content is for reference