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TVS - Diodes

The MXLP4KE170A is a dedicated transient voltage suppressor diode commonly used for powering electrical devices or lines. It is normally used in applications that need a surge and spike protection that can reduce the power supply disturbance to a low enough level for the power system to work properly. The MXLP4KE170A offers a graded power dissipation of 17V and an operating temperature range of – 55°C to + 100°C.

Application Field

The MXLP4KE170A is mainly used in low voltage applications such as consumer electronics, industrial electronics, automotive electronics, power electronics, telecom, medical and networking etc. The MXLP4KE170A is available in various packages to suit the application. It is an ideal choice for overvoltage protection from very high AC/DC pulses, which are likely to occur due to transient overvoltages caused by a variety of sources.

The MXLP4KE170A is used in specialized applications for protection against voltage transient over-voltage pulse currents. Its main application fields are for protecting data lines against Electrostatic Dischargement (ESD), Intermittent Overvoltages, along with Lightning Pulse withstands capabilities, according to standards IEC 61000-4-2, category CPST5. Moreover, it can provide protection against Electrostatic Discharge (ESD), interrupting overvoltage pulses and impulse hold-off services.

Working Principle

The basic working principle of the MXLP4KE170A is to absorb the transient excess voltage and dissipate safely it in the form of heat. This is accomplished by the breakdown of the silicon diode during the passage of an excessive current. When a high voltage spike strikes, the diode breaks down allowing current to be passed through it and the resulting current is safely dissipated in the form of heat. Since the diode is connected between the two lines of power, the voltage overshoot will not be applied to the entire circuit.

Another way to think about it is that the MXLP4KE170A acts as a clamp to limit the maximum voltage. The voltage rating of the diode determines its clamping capability, so for a 17V rating, the MXLP4KE170A would clamp any transient voltage spikes to about 17V. This makes it a great choice for protecting circuits from overvoltage transients.

The MXLP4KE170A also has several built-in features to help protect the circuit. The diode has a very low reverse leakage current, so it will not allow any current to pass in the reverse direction. Additionally, the diode has a high surge capacity rating which should be capable of withstanding any transient pulses, even if they are large enough to cause the diode to break down.

In summary, the MXLP4KE170A is a state of the art transient voltage suppressor diode used in application fields such as consumer electronics, industrial electronics, automotive electronics, power electronics, telecom, medical and networking etc. As an ultra-low reverse leakage current diode, the MXLP4KE170A provides efficient protection against transient overvoltage pulses that could potentially damage the circuits or power supplies.

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