SMAJ40A-M3/5A

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TVS - Diodes

TVS (Transient Voltage Suppression) Diodes are designed to protect sensitive electronic components from high levels of transient surges or spikes. They are able to withstand much higher peak voltages than regular diodes while still maintaining the same level of electrical current. The SMAJ40A-M3/5A is a two-way unidirectional TVS diode designed for use in ESD, lightning and inductive voltage spike protection.

SMAJ40A-M3/5A Application Field

The SMAJ40A-M3/5A is mainly used in the following application fields:

• Computer peripheral interfaces such as USB, IEEE 1394, RS232 etc.
• Mobile phones and cellular phones
• Computers and related peripheral equipment
• Audio/Video equipment
• Automotive electronics
• Telecommunications networks
• Industrial electronics

SMAJ40A-M3/5A Working Principle

The basic working principle of the SMAJ40A-M3/5A is very simple. It is a two-way unidirectional silicon avalanche diode (SAD) that functions as an overvoltage protector.

The diode is connected across the power supply and test points in a system. It normally remains in the reverse blocking mode, which allows very low current leakage from the protection device. But, when subjected to transient surges or spikes in voltage, the diode turns conducting and provides a low impedance path for the surge to pass.

The diode will usually remain in this conducting mode until the surge has subsided, after which it turns non-conducting again. The diode also has an ultra fast response time (less than 1ns). This ensures that it is able to react quickly to any surge or spike in voltage and can provide efficient protection for the system.

The SMAJ40A-M3/5A is also designed to be highly reliable and has a long service lifetime. It can withstand multiple transient surges, even up to 8000V, without any damage or reduction in performance. This makes it an ideal choice for protecting sensitive electronics from transients and other overvoltage conditions.

Conclusion

The SMAJ40A-M3/5A TVS diode is designed for a variety of applications where transient protection is required. It is highly reliable, has an ultra fast response time and can withstand multiple transient surges. As such, it is an ideal choice for any system that requires efficient protection against overvoltage conditions.

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