V18ZA05PX2855

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TVS Varistors, or transient-voltage-suppression varistors, are one family of over-voltage protection devices in the electrical engineering market. Made up primarily of non-polarized zinc oxide, these devices, such as the V18ZA05PX2855, primarily operate by the process of controlling, limiting, or even eliminating over-voltage or surge voltages on an electrical system. As these Varistors are not transistors, they are not triggered by input voltage like a conventional diode-based protection circuit does.

The V18ZA05PX2855 and other Varistors are designed to provide electrical over-voltage protection devices that are both fast and reliable for industrial, commercial, and consumer applications. This particular device is especially attractive due to its low leakage current (100 nA max. at 10 Vdc) and 400 V clamping voltage. It is a RoHS compliant, 2-terminal device with an electrical connection design that is both reliable and easy to install.

The working principle for Varistors such as the V18ZA05PX2855 is to use the limiting characteristics of non-polarized zinc oxide to provide fast over-voltage protection. It is considered a non-linear MOV (Metal Oxide Varistor) because its resistance changes dramatically when the clamping voltage is exceeded. This “limiting” action causes a sharply increasing resistance to voltage spike, limiting the amount of peak current that can be delivered to the device.

This Varistor’s application field includes over-voltage protection, lightning surge protection, power line over-voltage protection, and electrical contact protection. It can be used in appliances, power supplies, and industrial automation/robotics equipment as well. It is also suitable for a wide range of consumer electronic applications.

The Zinc Oxide Varistor, such as the V18ZA05PX2855, offers great performance for lightning surge and electrical contact protection, making it a popular choice for industrial, commercial and consumer applications looking to mitigate voltage spikes. With its low leakage current, sharp clamping voltage, and RoHS compliance, the V18ZA05PX2855 is an attractive choice for many applications.

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