MXLSMLG20CAE3 Circuit Protection

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A Transient Voltage Suppression or TVS diode, is a specialized, semiconductor, signal-clamping device which improves the immunity of voltage transients in circuits. These devices are designed to protect sensitive devices against voltage transients caused by electrical disturbances that may occur within a given system. MXLSMLG20CAE3 is an example of a TVS diode specifically designed for Transient Voltage Suppression protection.

Application Field

MXLSMLG20CAE3 is available in SOT-89 package type and provides excellent bidirectional protection up to 20 Volts. It can be used for ESDA 4.0 kV HBM, ESD testing. It also features +/- 15 kV ESD capability for air gaps discharge. With a typical fast response time of less than 1.0 ns, the MXLSMLG20CAE3 is well suited for ESD protection of USB 2.0, FireWire, analog and digital signals. These devices are also designed to provide effective protection against surges, EFT and lightning strikes.

Working Principle

The working principle of the MXLSMLG20CAE3 diode is based on the avalanche breakdown of a PN-junction diode. It includes a subthreshold breakdown voltage which is the voltage at which the breakdown occurs. This voltage is normally adjusted with the inclusion of a Zener diode or similar device. The working voltage of the MXLSMLG20CAE3 is 20 Volts and when this voltage is exceeded, the PN-junction will begin to conduct current. The avalanche breakdown of the PN-junction is characterized by a very low voltage drop across the diode and a very fast response time.

When the TVS diode is supplying a protection signal, the diode will absorb all the voltage which is greater than the established working value. This absorption of the voltage will result in the diode being subjected to high electrical and thermal stresses, which can lead to premature failure of the device. This is why it is important to use devices such as the MXLSMLG20CAE3 which are designed to handle these high electric and thermal stresses.

Conclusion

The MXLSMLG20CAE3 diode is an excellent TVS monolithic diode designed for use in a range of applications. It provides excellent bidirectional protection up to 20 Volts for analog, digital, USB 2.0 and FireWire signals. This diode is designed to provide fast response times (< 1.0 ns) while providing effective protection against transient voltages in both directions. Overall, the MXLSMLG20CAE3 is a reliable and cost effective solution for the protection of analog, digital and communication signals.

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