V18ZS2P

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TVS (transient voltage suppressors) are electronic components used to protect circuits from damage due to spikes of high voltage—more than the circuits – usually caused by electrostatic discharge (ESD). Varistors (also called voltage-dependent or voltage-sensitive resistors) are one type of TVS. MOVs (metal oxide varistors) are a type of varistor.

The V18ZS2P is a type of MOV certified for bi-directional protection against ESD pulses. It is a single-pole, double-throw, unipolar varistor which works in either excess voltage or lightning scenarios. It is designed to fit onto the standard 2-pin TSSOP (Thin Shrink Small Outline Package) package to reduce PCB (printed circuit board) footprint size in applications that need a high level of protection.

The chip has a bi-directional voltage and current clamping circuit that utilizes the capacitive and switching characteristics of the diode. A control circuit is also deployed to sense the input voltage. When the input voltage reaches the varistor’s clamping voltage level, the control circuit will switch and allow the capacitor to act as a short circuit.

The V18ZS2P is suitable for unipolar applications such as networking equipment, consumer and industrial electronics, appliances, and communication systems. The chip offers fast response, rugged robustness, low leakage current, as well as high-energy absorption.

The chip’s applications rely on two primary and related principles. First, it maintains a specified clamping voltage and withstands a maximum peak surge current, which limits the surge voltage to a safe level. Second, it has the ability to absorb energy in the form of voltage surge and its transient current waveforms. This is achieved when moving from an “open” clamping voltage to a “closed” state. At this point, the current rises in a linear fashion, and the chip absorbs energy and dissipates it as heat.

The V18ZS2P utilizes this energy-dissipation principle to shield the protected electronics from any overvoltage or overcurrent conditions by acting as a surge current capacitor. The capacitor is controlled by a voltage control circuit, and its capacitance can be adjusted depending on the application. It is this versatility that makes it an excellent choice for a wide variety of applications. The chip is also highly reliable due to its low Failure-in-Time (FIT) rate.

The V18ZS2P is an effective, low-cost, one-package solution for high-voltage, lightning, and ESD protection. It is suitable for a wide range of unipolar applications, which include networking equipment, consumer and industrial electronics, appliances, communication systems, and other electronic systems. It is extremely reliable, with a low FIT rate, and offers fast response and excellent energy absorption.

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