SM6T30A-M3/52 Circuit Protection

Voltage - Clamping (Max) @ Ipp:	41.5V
Supplier Device Package:	DO-214AA (SMBJ)
Package / Case:	DO-214AA, SMB
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	600W
Current - Peak Pulse (10/1000µs):	14.5A
Series:	SM6T, TransZorb®
Voltage - Breakdown (Min):	28.5V
Voltage - Reverse Standoff (Typ):	25.6V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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SM6T30A-M3/52 TVS – Diodes Application Field and Working Principle

TVS – Diodes are indispensable components when it comes to providing an effective protection against large voltage transients. It includes a variety of components, but the SM6T30A-M3/52 is one of the most popular ones, due its wide range of applications. This article will focus on its application field and how it works.

Application Field

The SM6T30A-M3/52 TVS– Diode, is mainly used in communication and monitoring systems, as well as in all types of AC or DC power grids, specially when it comes to overvoltage protection, due to its advanced protection capability.This kind of diode is very commonly used within industrial applications, as it is perfect when it comes to protecting mission critical electronic systems from voltage transients, including transients caused by sudden changes in voltage, or voltage spikes, like electrical discharges, which can damage the system and cause unexpected shut down. It can also be used in lightning protection circuits, such as cars, helicopters, aircraft and boats, as well as in high-end surveillance equipment, since it has an amazing capability of withstanding up to 5KV ESD.

Working Principle

The SM6T30A-M3/52 is a two-terminal electronic component, which works as a protection element against spikes in voltage. It has a limited functionality when compared to other power supplies, since it only works when the voltage surpasses a specific maximum operating value.Once this level is surpassed, the TVS-Diode will turn its impedance from low to high, providing a higher resistance against the current that is flowing. This way, the voltage is reduced and the device is protected from any harm.It is important to mention that after the voltage passes through the specified threshold, the diode works as a short circuit that regulates and returns the excess of energy to the origin. This is why it is necessary to use a proper voltage regulator in order to avoid possible damages in the device. The TVS-Diode also works as a capacitor; its voltage will always be lower than the applied voltage. This means that, it absorbs the excess of energy, which is passed back to the source.

Conclusion

The SM6T30A-M3/52 is one of the most common variants of TVS-Diodes, due to its wide range of application field and due to its high protection capabilities. Its limited functionality works great when it comes to protecting the device against overvoltages, and it is very useful in industrial applications, like mission critical electronic systems. As a two-terminal electronic component, the SM6T30A-M3/52 works by turning its impedance from low to high once the voltage surpasses the maximum operating value, providing a higher resistivity to the current and acting as a capacitor. This way, it reduces the voltage and absorbs the excess of energy, protecting the device from any possible damage.

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