MXLSMBJ20A Circuit Protection

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TVS (Transient Voltage Suppressor) Diodes protect sensitive electronic devices from damage due to voltage and current surges. The MXLSMBJ20A is an efficient diode intended to shield against such damages in automotive, industrial, and consumer electronics. In this article, we will delve into the applications and working principle of the MXLSMBJ20A.

Applications of the MXLSMBJ20A

The MXLSMBJ20A diode is used for ESD (electrostatic discharge) protection, lightning strikes, and high surges caused by inductive and capacitive loads. It can also be used in automotive systems, industrial machinery and consumer electronics. It is frequently found in applications such as:

• Car lights and engines
• Inverters, generators and elevators
• Cellular phones, PDAs and laptop computers
• Screens, speakers and other audio/video products

Typical Characteristics

The MXLSMBJ20A is a unidirectional diode available in a SMA package with a maximum power dissipation of 5W. It has a maximum surge current capability of 500A with a reverse stand-off voltage of 20V. This makes it well suited to withstand the high energy of transient pulses or power inductive loads.

Working Principle

The MXLSMBJ20A is designed with a modulated neodymium-doped silicon die that allows the device to switch quickly to a low impedance when subjected to over-voltage conditions. This allows the diode to act as a "crowbar" circuit, short-circuiting the circuit and providing protection by clamping the surge voltage down to a safe level. The diode is able to switch on and off much faster than regular diodes due to its construction, and has a much faster response time as well.

Unlike normal diodes, TVS diodes also offer bidirectional protection. This makes them ideal for use in both unidirectional and bidirectional circuits, allowing them to absorb and withstand surges coming from either direction. This makes them well suited for applications such as HVAC systems where two-way protection is required.

Conclusion

The MXLSMBJ20A Transient Voltage Suppressor Diode is a powerful, efficient protection device designed to protect sensitive electronic components from the damaging effects of voltage and current surges. It is well suited for use in automotive, industrial, and consumer electronics where ESD, inductive and capacitive loads could be an issue. It has a maximum surge current capability of 500A with a reverse stand-off voltage of 20V, and a fast response time making it suitable for both unidirectional and bidirectional applications.

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