SMAJ28CA-Q

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TVS Diodes are specially designed to protect sensitive electrical components from electrical transients, such as lightning strikes, power line surges, and electrostatic discharge (ESD). The SMAJ28CA-Q is a unidirectional dual-diode transient voltage suppressor (TVS) designed for equipment protection from over-voltage transients.

Description

The SMAJ28CA-Q is a two-diode transient voltage suppressor composed of a silicon diode chip and a PN junction diode connected in series. It has a unidirectional symmetrical high-temperature soldering characteristics, a low clamping voltage, and a low leakage current. It is capable of breaking down at low and medium surge voltages, while providing a reliable and cost effective protection against transient spikes and pulses. Furthermore, the SMAJ28CA-Q is largely resistant to electrostatic discharges, meaning that it won\'t be damaged by sudden static electricity discharge events.

Application Field

The SMAJ28CA-Q TVS is typically used in consumer electronics, such as computers, electronic instruments, and electrical equipment. It is highly suitable for low-voltage systems, such as those below -600 volts. It also offers protection against ESD, EFT, and other surges. The SMAJ28CA-Q TVS can be used in applications such as gate driver units, automotive computers, and power supply circuits.

Working Principle

The SMAJ28CA-Q TVS operates on the avalanche breakdown mechanism. During an excessive voltage surge, the diode junction breaks down and a large current flows through the device, clamping the over-voltage to a safe level. The current increases linearly with an increase in the reverse voltage across the terminal and dissipates the over-voltage energy safely until the voltage returns to its normal level. The reverse breakdown voltage of the SMAJ28CA-Q is typically -8V to -600V, while the repetitive peak pulse power is greater than 350 watts.

Conclusion

The SMAJ28CA-Q TVS is an effective and reliable transient voltage suppressor capable of protecting electrical components from damaging over-voltage surges, static electricity discharges, and other transients. Its unidirectional symmetry and low clamping voltage make it highly suitable for consumer electronics and other low-voltage systems, while its low leakage current ensures excellent protection against electrostatic discharge. It is easy to install and provides reliable protection, making it an ideal choice for many applications.

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