SMBJ8V5A Circuit Protection

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TVS (Transient Voltage Suppression) diodes are used to provide surge protection in electronic circuits from voltage spikes. The SMBJ8V5A is a common TVS diode used in a variety of applications, offering effective protection against both over-voltage and over-current transients. This article will look at the application fields and working principles of the SMBJ8V5A.

Application Fields

The SMBJ8V5A has typical applications in telecommunications equipment, computers and peripherals, automotive systems, industrial controls and medical instrumentation. This diode can be used to protect against over-voltage transients in both AC and DC applications, such as those produced by lightning, motor starts, and contact with external power sources. It is also commonly used to protect circuits from over-current transients.

Working Principle

The SMBJ8V5A is a unidirectional diode designed to clamp transients above 8V. When there is an over-voltage or over-current transient, the diode\'s electrical characteristics are designed to rapidly shut down the transient current. This is accomplished by creating a higher voltage drop across the diode that quickly reduces the circuit voltage to a safe level and prevents any further damage to the circuit.

The device is designed to dissipate up to 1500W of power in an 8/20µs waveform and up to 250W of power in a 10/1000µs waveform. The device is available in surface mount and through-hole packages, making it an ideal choice for both retrofit and new designs. The device has an operating temperature range of -55°C to 125°C.

Conclusion

The SMBJ8V5A is a versatile and reliable TVS diode used for protecting sensitive circuits from over-voltage and over-current transients. The device is designed to quickly reduce the transient current while dissipating up to 1500W of power in an 8/20µs waveform. The device is available in both surface mount and through-hole packages and has an operating temperature range of -55°C to 125°C, making it suitable for a variety of applications.

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