CG0402MLU-3.3G Circuit Protection

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CG0402MLU-3.3G is a type of transient voltage suppressor (TVS), also known as a Metal Oxide Varistor (MOV). It is part of a larger family of TVS, which includes Varistors and MOVs. A TVS is designed to provide protection against voltage-induced transients that can damage electronic components.

CG0402MLU-3.3G is designed to protect low power automotive electronics such as ECUs, SRAMs, logic devices, and CANbus networks from transient overvoltage events. It can provide up to 3.3G (3,300 volts) of protection against transients with an operating voltage range from 6V to 18V. The device is rated to support up to 1A of current at 125°C. It is available in various sizes and package options, such as 0402 (1A), 0603 (500mA), 0805 (400mA), and 1206 (200mA).

The general working principle of a CG0402MLU-3.3G is that of a two-terminal, nonlinear device that is designed to reduce voltage across its terminals. Essentially, it uses its nonlinear electrical characteristics to convert an AC voltage of some waveform to one of a constant DC voltage. During a transient, the device senses the incoming voltage and responds by acting as a short in order to reduce the voltage across its terminals. This response helps to protect downstream components from potential damage caused by the overvoltage event.

The device operates in two modes. The first mode is the protection mode, where the device reacts quickly to reduce the voltage across its terminals. The second mode is the storage mode, where the device slowly releases the energy of the transient to help prevent gradual degradation of components over time.

The device can also provide reverse-polarity protection, which is useful for automotive applications. It will conduct current in both directions when triggered, helping to protect against reverse-polarity transients.

In summary, CG0402MLU-3.3G is a type of TVS that provides transient protection up to 3.3G against transients in low power automotive electronics. It is designed to provide protection in two modes, and can provide reverse-polarity protection. It is available in various sizes and package options.

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