MXSMCJ17A Circuit Protection

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Transient Voltage Suppression (TVS) diodes are special types of diodes used to protect sensitive electronic circuits from possible damage due to transient over-voltage spikes. The MXSMCJ17A is an ultra-low capacitance unidirectional two-electrode protection diode that has been designed for ESD and lightning protection in high-speed signal and data line applications. It is housed in a small surface mount package.

Application Field

The MXSMCJ17A is designed to protect high-speed data and signal lines from electrical overstress (EOS) induced by lightning strikes, ESD spikes, and induced disturbates. IT is especially ideal for use in automotive electronic systems. IT also finds its applications in consumer-oriented electronic devices, such as portable computing and communication equipment, switches, and UPS systems. The protection diode is capable of clamping maximum voltage spikes up to 17V. It offers superior ESD protection, up to 30kV, making it suitable for all RS-485 and RS-232 data transmission/receiving signals.

Working Principle

The MXSMCJ17A is designed using a silicon avalanche design, which enables protection from transients up to the maximum clamping voltage of 17V. The protection diode has two terminals, with the anode tied to the signal line and the cathode to ground. It works by rapidly redirecting transients to the ground as soon as they are detected, thereby preventing them from propagating further away. This type of diode can be used as a stand-alone protector, or as part of a circuit protection system.

When a transient increases the voltage across the diode, the Avalanche Breakdown occurs, leading to a high reverse current through the diode, which ultimately gets redirected to the ground. This process is quick and efficient, and it clamps the resultant reverse voltage at a safe level. In addition to this, the diode is also capable of safely handling ambient operating temperatures up to 175°C, making it suitable for use in severe conditions.

Conclusion

The MXSMCJ17A protection diode is an ideal device for use in automotive and consumer electronics, providing ESD and lightning protection against transient over-voltage spikes. It has been designed with a special silicon avalanche design, enabling it to protect up to 17V of transient voltage. It is capable of operating in extreme temperatures up to 175°C, making it suitable for use in harsh environments. Additionally, the diode offers a low capacitance of 4pF, allowing it to carry out fast and efficient signal transmission.

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