MXP5KE120CA

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Transient Voltage Suppression Diode, more commonly referred to as TVS Diode, is a type of electrical component that acts to protect the circuit from high voltage spikes caused by an electrostatic discharge (ESD), a sudden voltage surge, or a load dump. In particular, the MXP5KE120CA is a unidirectional diode that can operate effectively on small signal lines with high speed and low clamping voltage.

Application Field

The MXP5KE120CA is primarily used to absorb ESD and other voltage transients in high speed data applications. It is useful in protecting sensitive components from damage caused by voltage surges and for protecting data lines from external ESD strike, typically providing up to 18KV ESD protection. It is suitable for use in applications ranging from12V in Automotive, Industrial, andConsumer Electronics, such as xDSL and Set Top Boxes. It is also typically used in Mobile Communications, Telecommunications, and Networking Equipment.

Working Principle

The working principle of the MXP5KE120CA is based on the PN junction diode with an integrated avalanche effect, which allows current reversal when a high voltage pulse is applied. If the applied voltage exceeds the peak value of the breakdown voltage, an avalanche current forms and this causes a rapid increase in voltage, allowing the device to be exposed to high voltage spikes without deteriorating. The breakdown voltage is 5.6V with a triggering voltage of 4.2V.

The device is made up of two layers; the first layer is the PN Junction Diode, which conducts current in a single direction when biased correctly. The other layer is an avalanche layer, which has internal junctions that, when subjected to an avalanche voltage, generate high current in the reverse direction. This reverse current is then used to clamp the voltage on the device to a predictable level. By adjusting the breakdown voltage, the avalanche layer acts as a ‘safety valve’, limiting the minimum operating voltage of the device.

The MXP5KE120CA ensures that surges and ESD strikes are quickly absorbed and dissipated, preventing damage to the line and other components. This is accomplished with a very fast restore time that is significantly less than 10 picoseconds, ensuring that the line is able to withstand extremely high ESD levels, while still providing the protection necessary to maintain a high level of integrity.

The MXP5KE120CA is an ideal solution for designers in need of a low clamping voltage and high speed transient suppression device. It is capable of withstanding ESD pulses of up to 18KV, making it an ideal choice for data and telecom applications.

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