SMCG20CA-M3/9AT

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Transient Voltage Suppressors (TVS) are devices designed to limit peak voltage on a circuit from both positive and negative voltage surges. TVS diodes are a type of TVS made up of two active semiconductor layers enclosed in a cathode casing. Specifically, the SMCG20CA-M3/9AT TVS diode is a unidirectional device designed for surface mount applications and is made up of an N-channel Zener silicon chip and a P-channel MOSFET silicon chip.

The application fields of the SMCG20CA-M3/9AT include rectification, EMI/RFI filtering and surge protection in fields such as power management interfaces, automotive electronics, communication systems and telecoms equipment. It is suitable for a wide range of applications that require bidirectional Over-Voltage protection.

The default UniDIR reverse breakdown voltage of the SMCG20CA-M3/9AT is 14 - 21V. The Static Ipp capability per line is peak pulse current is around 20A (8/20us). It has a low leakage current and high surge power capability. The Junction-to-cathode Capacitance is about 9pF.

The working principle of the SMCG20CA-M3/9AT is to temporarily reduce or eliminate a large voltage spike in a circuit before it can reach the power system or other components. It consists of two semiconductor layers that produce the reverse breakdown voltage needed to form a conducting channel between two wires. When an over-voltage spike appears on the input line, these two layers act like a diode and produce a voltage controlled latching function.

In the event of an over-voltage surge, the upper MOSFET layer will start to conduct thereby forming a closed loop current path which will divert excess current around the circuit, away from the device. The lower Zener layer will also start to become conductive, reducing the amount of voltage present in the circuit, eliminating the energy surge and protecting the circuit from damage.

The superior features and performance of the SMCG20CA-M3/9AT make it a great choice for a wide variety of applications. With its fast switching characteristics, wide dynamic range and low capacitance, it offers a reliable solution to assuring system performance and electrical safety. Its robust design and robust construction make the SMCG20CA-M3/9AT an attractive option when it comes to surge protection.

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