V18ZA05

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Transient Voltage Suppressors (TVS) are vital components used in electronic circuits to protect from electrical surges. TVS come in various forms, including Varistors, Metal Oxide Varistors (MOVs) and Metastabil devices. The V18ZA05 is a Varistor from Bourns, Inc. that is designed to protect against lightning and electrostatic discharge (ESD) events. The V18ZA05 is a bidirectional Varistor, which is a form of balanced voltage protection. A bidirectional Varistor is made from a combination of two Zener diodes in reverse in parallel so that electrons flow symmetrically in both directions along the Varistor.

Varistors are designed to protect electronics from transient overvoltage that may occur due to changes in current in an electrical system. In order to do this, the Varistor quickly absorbs the surges in voltage by diverting the extra current away from the protected electronics. Varistors are made up of two electrodes, a ceramic body, and two layers of zinc oxide which compose the external surfaces. The layer of zinc oxide is covered with a voltage leakage material and an insulation plate.

The V18ZA05 from Bourns is a metal oxide varistor (MOV) which is designed to fight lightning and ESD. MOVs are typically the best choice for transient protection against lightning. It offers higher performance levels than other types of components, providing excellent surge protection. It has a clamping voltage of 18 volts with a typical surge current rating of 5mA. The V18ZA05 has a maximum surge capability of 30mA, perfect for protecting against lightning and ESD. It also has a minimum capacitance of 2000pF, making it perfect for a variety of applications such as signal lines and DC rails.

The working principle of Varistors is quite straightforward. When there is an overvoltage on a circuit, the varistor begins to conduct through its Zener diode junction. This causes the voltage to decrease and the current to increase, thus providing the necessary protection for the attached circuit or device. When the voltage returns to the normal level, the Varistor stops conducting and returns to its non-conductive state.

The V18ZA05 from Bourns is a highly reliable Varistor that is designed to provide surge protection in a variety of applications. It is ideal for use in AC line cords, automotive, and consumer electronics with its low capacitance, high maximum surge allowance, and balanced voltage protection – all features that will help ensure the safety and reliability of electronic devices and systems.

The V18ZA05 is an ideal choice for providing fast response to transient voltage spikes caused by lightning or electrostatic discharges, and helps protect computers, telecommunications equipment, and electronic devices from sudden failure due to accidental mishandling.

In summary, the V18ZA05 from Bourns is a Varistor designed to be used in applications involving lightning and electrostatic discharge protection. It is made up of two reverse biased Zener diodes, a ceramic body, and two layers of zinc oxide. The V18ZA05 offers a maximum surge capability of 30mA and it has a clamping voltage of 18 volts with a typical current rating of 5mA. It also offers excellent transient protection against lightning due to its minimum capacitance of 2000pF and its balanced voltage design.

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