MXLSMBJ78A Circuit Protection

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TVS (transient voltage suppression) diodes are widely used in the protection of electronic equipment.In the terms of provide the protection for the systems against transient voltage, the MXLSMB78A diode stands out. Specifically, this product can play a key role in data line protection of Tv and STB products (set-top boxes).

The MXLSMB78A has a built-in ESD (electrostatic discharge) protection variant and a strong protection capability against static electricity. The MXLSMB78A is composed of two diodes in series and one Zener diode. The two series diodes are back-to-back connected with the Zener diode, thereby forming a unique structure and providing the best protection.

In the application field of TV and STB products, excessive transient voltages are used from outside or inside of the circuit. The two series diodes of MXLSMB78A will clamp these transient voltages at the time of clocking into the TV or STB products, thereby providing protection. Nowadays, an extra line is usually added in the PCB board of TV or STB products in order to protect the board from ESD (electrostatic discharge) caused by human body touch. In this case, MXLSMB78A will be the best solution. Thanks to its built-in ESD variant, MXLSMB78A can provide protection evens for direct touch and no failure will occur as a result.

The working principle of MXLSMB78A is simple. When the voltage exceeds the voltage clamping point (the Zener voltage of Zener diode), the current will flow out from this point and return to source. In other words, the high voltage will be clamped and the transient voltage will be limited to the clamping voltage, thus providing the protection for the circuit.

As can be seen, the MXLSMB78A diode provides the best protection against transient voltage in the application field of TV and STB products. With its strong protection capability and built-in ESD variant, the product ensures failure not occurs while providing a long life span to the applications.

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