SMCJ45A-HR

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

TVS (transient voltage suppressors) diodes are a type of semiconductor device, which offer a wide variety of protection applications to protect electrical and electronic systems against surge, induced transient voltages, or ESD (electrostatic discharge). The SMCJ45A-HR is a widely used diode in this category. This article will discuss its application fields and working principle.

Application Fields

The SMCJ45A-HR is a surface mount device specifically designed for protection against voltage transients caused by lightning or other electrical faults. It is a bidirectional, low-capacitance, Bidirectional Transient Voltage Suppressor (TVS) diode for various I/O protection applications. Its low profile, small footprint and high surge current rating make it ideal for use with microprocessors, ASICs, ASSPs and power MOSFETs. The SMCJ45A-HR is designed for robustness and performance in applications requiring high ESD protection and low capacitance. It is suitable for protecting against lightning surges, system transient voltages, and ESD.

It can also be used to protect against electrostatic discharge (ESD) in sensitive circuits, including input/output circuits, power supplies, and control switches. Additionally, its low capacitance makes it suitable for use as a low-noise diode in switched-mode power supplies (SMPSs).

The SMCJ45A-HR is available in a surface-mount package, allowing for easy mounting and protection and can also be supplied in larger packages. The voltage clamping response is very quick and the transient response time is independent of input signal level. Its specifications are suitable for a wide range of protection applications and the device is well suited for high performance, cost sensitive applications.

Working Principle

TVS diodes work by providing a low impedance path to ground in the event of an electrostatic discharge (ESD) or transient electrical event. The low impedance path to ground dissipates the energy from the ESD or transient voltage by redirecting the electrical current away from sensitive circuits.

The SMCJ45A-HR consists of a diode conductor sandwiching a reverse-biased PN junction junction element. During normal operation, the PN junction element is reverse biased, and therefore does not conduct. In the event of an ESD or transient voltage event, the junction element breaks down, creating a low impedance path to ground and diverting the electrical current away from the protected circuit.

The device also has a low turn-on voltage, which means that it begins clamping the voltage quickly and the response time is not dependent on the level of the input signal. Additionally, for applications requiring high ESD protection and low capacitance, the SMCJ45A-HR has the appropriate specifications.

Conclusion

The SMCJ45A-HR is a widely used TVS diode with a great many applications. It is designed for robustness and performance, and is suitable for high performance, cost sensitive protection applications. It has a quick response time, and low turn-on voltage, allowing it to start clamping the voltage quickly. Its low capacitance makes it suitable for switched-mode power supplies as well as general ESD protection.

The specific data is subject to PDF, and the above content is for reference