MXLSMCG78A Circuit Protection

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TVS - diodes are devices used in many applications to protect other components from damage due to surges, lightning, and other ESD (electrostatic discharge) events. The MXLSMCG78A is a common TVS-diode used in many applications and is designed to protect against transient-voltage surge events and their subsequent transients that could cause extensive signal degradation.

The MXLSMCG78A is a bi-directional surge-protection diode, meaning that it is built to offer protection to both anode and cathode voltages. This makes it an ideal choice for dual-polarity protection requirements. The device is combination of Spark Gap technology with Zener diode, to provide a Clamping Voltage of 85V. It is available in an 8-lead dual in-line plastic package and a 5-lead Surface Mount Package.

The MXLSMCG78A is designed to clamp the transient voltage and limit the peak current to a safe 25A, while allowing the continuous current to remain unaffected. The device contains a Zener diode to protect against voltages up to 85V, giving the device a wide protection range. The device can be used in high-speed environments such as SCSI and other data transmission lines. It can also be used to protect power and communication lines from arcs or from excessive load dropout.

The working principle of the MXLSMCG78A is based on the protection of the current from transients. When the input voltage falls below the clamping voltage, the device is extinguished, which leaves a voltage differential between the anode and cathode. The spark gap then triggers releasing an avalanche breakdown current to protect the underlying component from damage caused by the transient. Once the transient is over, the spark gap re-extinguishes, allowing the protected component to remain unaffected.

The MXLSMCG78A is designed to provide excellent protection against transient voltages and the transient currents generated by them. It is useful in many applications including SCSI, communication systems, automotive electronics, and other applications where a high-speed, bi-directional protection is needed. Its 85V clamping voltage provides a wide range of protection, while its low capacitance and low ESD susceptibility make it an ideal selection for many applications.

The MXLSMCG78A can be easily integrated into the existing printed circuit board designs, as it comes in both an 8-lead dual in-line plastic package and a 5-lead Surface Mount Package. It is widely available from many vendors and is offered in various package sizes, making it easy to select the right device for any application.

In summary, the MXLSMCG78A is a highly reliable and effective device for providing protection against transient voltages and transients. Its combination of spark gap and Zener diode technology makes it an ideal selection for many applications, while its low capacitance and low ESD susceptibility make it a great choice for applications where high-speed bi-directional protection is needed. This device is widely available in both 8-lead dual in-line and 5-lead Surface Mount package sizes and is low-cost and highly reliable.

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