MAP4KE120A

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TVS diodes are widely used components used in different applications to protect sensitive electronic circuits from overvoltage transients that can cause damage. The MAP4KE120A is one such widely used TVS diode in the market. This article provides an in-depth look into the different application fields of the MAP4KE120A and its working principle.

MAP4KE120A is a bidirectional transient voltage suppressor device meant for ESD, Electrostatic Discharge, and surge protection for data ports and bus lines in consumer electronic circuits. It is specially designed for protection against direct or indirect lightning strikes and it can suppress fast transients with high peak power of 120W at 10/1000 µs.

The MAP4KE120A comes in a SOIC-8 (single in-line package) package and can be used in a wide variety of applications from automotive systems, industrial systems, HVAC systems among others. It is a low-capacitance device that does not significantly degrade the signal integrity of the data line and can be used for data transmission in high-speed applications such as USB, IEEE-1394, etc. It is also RoHS compliant and lead-free.

MAP4KE120A also provides ESD, Electrostatic Discharge, protection at very high levels at ±25kV Human Body Model (HBM). It also has a low clamping voltage of only 17.2V at 8A and a very fast response time of 2ns for 8/20µs control. With an operating temperature range of -40°C to 125°C, it is suitable for both commercial and industrial applications. It also has a maximum surge current of 60A and leakage current of 2µA.

The working principle of MAP4KE120A is very simple. It is basically a zener diode and thyristor combination in which the thyristor is reverse-biased under normal operating conditions. The high energy and high peak power transients are absorbed by the diode and the thyristor will conduct if the voltage exceeds a certain threshold. This will reduce the voltage to a protected level and thus protects the sensitive electronics from any damage due to over-voltage or high energy transients.

To summarize, the MAP4KE120A is a bidirectional transient voltage suppressor device used for data ports and bus lines protection in consumer electronics. Its low-capacitance, high peak power and fast response time makes it suitable for high-speed applications such as USB, IEEE-1394 etc. and it is also RoHS compliant and lead-free. Its working principle is very simple, in which it absorbs the high energy and high peak power transients and reduces the voltage to a protected level thus protecting the sensitive electronics from any damage due to over-voltage or high energy transients.

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