CD143A-SR3.3 Circuit Protection

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TVS - Diodes

TVS - Diodes are a type of semiconductor device utilized for protection against overvoltage conditions that can possibly damage electronic circuits. The most commonly used form is the Transient Voltage Suppression Diode (TVS - Diode). The CD143A-SR3.3 is a bi-directional TVS Diode specifically designed to protect the automotive industry’s CANbus systems. It is a glass-passivated junction device with excellent surge and ESD protection, wide operating temperature range, and low capacitance.

CD143A-SR3.3 Application Field

The CD143A-SR3.3 is one of the most comprehensive protection solution for automotive CANbus systems. It is designed to protect the CANbus from ESD, transients, and other overvoltage events. It is used in a wide range of automotive applications, from ECUs and automotive infotainment systems to instrument clusters and vehicle networks. In addition, the CD143A-SR3.3 can be used to protect industrial applications such as communication networks, railway systems, and even power supplies.

CD143A-SR3.3 Working Principle

The working principle of the CD143A-SR3.3 is based on the avalanche breakdown characteristic of a semiconductor diode. It is composed of two parts: a junction diode and an ESD protection diode. The junction diode provides protection against ESD events and transients, while the ESD protection diode limits the surge current and lowers the overvoltage level. When an overvoltage event occurs, the junction diode becomes forward biased and starts conducting current. This carries the surge current away from the automotive device and into the external circuit. At the same time, the ESD protection diode begins working, lowering the overvoltage level through its voltage overshoot and absorption characteristics. As the surge energy is dissipated, the junction diode and ESD protection diode return to their original states. The CD143A-SR3.3 provides an excellent protection solution for CANbus systems and other automotive devices against overvoltage events.

Conclusion

The CD143A-SR3.3 is a bi-directional TVS - Diode specifically designed for automotive CANbus systems. It provides excellent protection against ESD, transients, and other overvoltage events, and is widely used in automotive applications such as ECUs, infotainment systems and vehicle networks. The working principle of the CD143A-SR3.3 is based on the avalanche breakdown characteristic of the semiconductor diode, making it an effective and reliable protection solution.

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