MXLSMBJSAC7.0 Circuit Protection

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TVS - Diodes: MXLSMBJSAC7.0 Application Field and Working Principle

The MXLSMBJSAC7.0 is a TVS - Diode, which has specific application and working principles. Its main function is to provide protection from transients and high-frequency spikes on power and data lines.

Application Field

The MXLSMBJSAC7.0 is designed for general applications, in particular high-speed data lines or areas with severe EMI/ RF interference. Common applications include industrial and communications equipment, medicaland military/aerospace systems, automotive systems, broadcast and entertainment systems, consumer electronics, and power supplies. In addition to power line applications, the device can also be used for signal, data, and video tines.

Working Principle

The MXLSMBJSAC7.0 consists of a metal oxide varistor (MOV), which acts as a voltage dependent resistor, and a zener diode in parallel. When a spike exceeds the limit of the varistor’s breakdown voltage U, the current will flow through the zener diode part. This part of the device then supplies additional resistance, which limits the current of the surge and minimizes potential damage.

When the surge passes, the varistor’s resistance returns to normal. The zener diode part is then again passively bypassed. The surge energy is absorbed in the varistor and dissipated as heat. The device does provide protection from over-voltage transients but it does not provide protection from direct or alternating current.

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