SMBG90A-E3/5B

TVS - Diodes

TVS (transient voltage suppression) diodes are semiconductor devices designed to protect the electronic circuits from induced transient overvoltages, which originate from external sources such as lightning, power line switching and disturbances. TVS diodes are widely used in applications such as automotive, communications, consumer electronics, IT and medical equipments. Among various types of TVS diodes, SMBG90A-E3/5B (also known as SMCJ90A-E3/5B) is a bilinear unidirectional TVS diode.

SMBG90A-E3/5B Application Field and Working Principle

SMBG90A-E3/5B is a double-breakdown galvanic connection extended type of TVS diode. The device is specifically designed for applications where an extreme voltage clamping is required, such as in high voltage applications like motors, generators and power systems. The device also excels in lightning protection applications. It is suitable for use in equipments with a rated operational voltage of up to 1100V.

This device utilizes a bilinear regions structure with separate zener and avalanche breakdown regions. The low forward voltage during normal operations allows for energy savings and high operating efficiencies. When an overvoltage is induced on the device, the device will enter a conduction state and the current will be gradually limited in the avalanche region, and slowly reduced in the zener region until the voltage returns to nominal level. During the process, as the device enters a defined conductivity stage that clamps the voltage, the SMBG90A-E3/5B is able to withstand high power impulseduring its operation.

Conclusion

The SMBG90A-E3/5B is a bilinear unidirectional TVS diode designed to protect circuits from transient overvoltages. Its high voltage clamping capabilities and low forward voltage during normal operations make it an ideal choice for applications with a rated operational voltage of up to 1100V, such as motors, generators and power systems. Its also excels in providing lightning protection for electrical and electronic equipment.