SMAJ36A Circuit Protection

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TVS diodes, also known as transient voltage suppressors, are used in a variety of applications to protect sensitive electronics from high-voltage transients. The SMAJ36A is a dual-channel TVS diode designed to protect two data lines from transient voltage and dips. This article will discuss the application fields of the SMAJ36A, as well as its working principle.

Application Fields

The SMAJ36A can be used in a variety of applications to protect electronics from transient voltages. It is specifically designed for low to medium power applications involving data lines that require surge protection from induced voltage transients. Examples of application fields include:

• Automotive electronics
• Data networking
• Industrial electronics
• Consumer electronics
• Medical equipment
• Power supplies
• Telecommunication systems

The SMAJ36A is also suitable for a variety of AC and DC line protection applications, such as in low voltage systems with operation voltages up to 36 VDC. It is also suitable for protection against destructive electrostatic discharge (ESD) and radiated EMI pulses.

Working Principle

The SMAJ36A is a dual-channel TVS diode designed for protection of two data lines from transient voltages and dips. It is composed of two back-to-back Zener diodes connected in parallel with bidirectional breakover protection along with an N-channel MOSFET connected in series with each diode. When a transient voltage appears on the data lines, the Zener diodes breakover and start to conduct current through their depletion layers, while the MOSFETs become forward-biased and start to conduct current. This conducts the current through the device, thus protecting the data lines from damage.

The SMAJ36A is capable of handling an impressive number of charge cycles and handling transient voltages up to 27 VDC. The device can handle currents up to 500 mA, and is available in a variety of packages, such as SOT-563, SOT-23-6, and SOT-23-5. The typical breakdown voltage is 6.4 VDC, while the typical clamping voltage is 10.8 VDC.

Conclusion

The SMAJ36A is a dual-channel TVS diode designed for protection of two data lines from transient voltages and dips. It is composed of two back-to-back Zener diodes connected in parallel with bidirectional breakover protection along with an N-channel MOSFET connected in series with each diode. Due to its impressive charge cycle handling capabilities and high surge protection rating, the SMAJ36A is suitable for a wide variety of applications, including automotive electronics, data networking, industrial electronics, consumer electronics, medical equipment, power supplies, and telecommunication systems.

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