SMC3K28CA-M3/9A Circuit Protection

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TVS - Diodes offer an efficient way of providing protection from transient surges in industrial and consumer electronics devices. The SMC3K28CA-M3/9A, a transient voltage surge suppressor (TVSS) device, is a unidirectional, general-purpose TVS diode. It is used to protect downstream electronics from unwanted transient power surges or for including ESD events.

Overview

The SMC3K28CA-M3/9A is ideal for all types of ESD protection, in addition to providing protection against wide ranges of surge voltages. It has a reverse breakdown voltage (BVr) rating of 28V, and a power dissipation rating of 150W. Its unidirectional nature ensures that only the positive line is clamped while the negative line remains unaffected. The SMC3K28CA-M3/9A does not require additional external components in order to provide protection, which makes for a low-cost solution.

Application Fields

The SMC3K28CA-M3/9A is suitable for a wide range of applications such as audio-visual and telecommunications devices, ethernet networks, automotive and home appliances, circuit boards, and personal electronics. Its various features make it an ideal candidate for providing highly reliable transient protection in these applications. It is suitable for high-bandwidth systems and can provide over-voltage protection up to 2kV.

Working Principle

The SMC3K28CA-M3/9A utilizes a unidirectional reverse biased PN junction diode. When voltage is applied, it reaches a point at which the diode begins to break down. At this point, it commences conducting, and this passing of current through the diode dissipates the voltage. This is known as avalanche breakdown. When the surge levels are reduced the diode reverts back to its open state, thus providing protection from transient and ESD events.

The application of these diodes can be regulated using the clamping voltage of the diode, as well as the breakover voltage. The clamping voltage is the highest voltage which the diode will sustain without any damage occurring, while the breakover voltage is the voltage in which it starts responding and conducting. The maximum clamping voltage indicates the potential which the diode can absorb before any damage is done to the device.

Advantages

The SMC3K28CA-M3/9A offers a range of benefits for its users. Firstly, it provides a low-cost solution for surge protection as no additional components are needed. Secondly, it is suitable for applications that require high-bandwidth, providing over-voltage protection up to 2kV. Lastly, it ensures that only the positive line is clamped while the negative line remains unaffected. This ensures greater reliability and efficiency. Its features make the SMC3K28CA-M3/9A an ideal choice for providing protection in a number of applications.

Conclusion

The SMC3K28CA-M3/9A is a unidirectional, general-purpose TVS diode used for providing protection from transient and ESD events. Its features make it suitable for a wide range of industrial and consumer electronics devices, and its unidirectional nature ensures that only the positive line is clamped while the negative line remains unaffected. Its low-cost solution and high-bandwidth make it an ideal choice for surge protection. It is recommended for providing reliable protection against transient and ESD events.

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