ERZ-E10E511

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TVS - Varistors, MOVs, have been developed in order to protect electric circuits from overvoltage damages and electrostatic discharges. The application field of ERZ-E10E511 is mainly focused on the transient overvoltage protection of analog and digital lines, such as HDMI, USB, and many other data ones. This article intends to analyze its working principle and application field, in order to bring out a better understanding of its use.

ERZ-E10E511 is composed of two components: a silicon avalanche diode (SAD) connected in series with a multilayer varister (MLV). The standardization of SADs and MLVs into a single component has its origin in the increase of the integration levels of systems, by simplifying the electrostatic protection of inputs and outputs of integrated circuits. The combination of both elements helps in minimizing the parasitic capacitances, making them suitable for high-frequency protection.

This combination of components works, in the same way, as a Zener diode. The SAD works as a voltage clamp, whereas the MLV has the main function of reducing the capacitance between the SAD and the circuit itself. This capacitance affects the overall impedance, thus affecting the response time of the protection. When an over voltage is applied, the SAD begins to conduct and, due to its parasitic capacitance, reduces the voltage across itself until it reaches its own breakdown voltage. The electric current through the SAD then reduces, forming a voltage clamp that helps protect the connected circuit from harmful voltage levels.

The application of ERZ-E10E511 covers many different fields, such as automotive, consumer electronics, industrial and telecom applications. This type of protection component can be used in applications, such as surge protection, telephony overvoltage protection, and onboard overvoltage and EMI protection. It is also suitable for use with high-speed signals, such as HDMI, USB, Ethernet, and other high-speed data lines.

The working principle of this component is the combination of SADs and MLVs into a single component, which provides an effective overvoltage protection. They are suitable for providing protection to different types of circuits, such as analog, digital, and high-speed signals and are often used in automotive, industrial and consumer electronics applications. These protection devices not only protect the circuits from overvoltage damages but also reduce parasitic capacitances generated by other components and reduce the response time of the protection. Therefore, they can be used in many different applications in order to provide reliable overvoltage protection.

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