P4KE8.2A-E3/73 Circuit Protection

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TVS - Diodes are special components designed to protect electrical systems and components from high-voltage transients such as lightning, electrostatic discharge (ESD), and other short-duration energy surges. The P4KE8.2A-E3/73 is a type of transient-voltage-suppression diode (TVS). Its application field and working principle are discussed in this article.

Application Field

The P4KE8.2A-E3/73 is a bidirectional unidirectional diode (BUD) that is ideally suited for transient protection in telecommunications applications such as central office and ring-back equipment, as well as other surge-sensitive systems. The P4KE8.2A-E3/73 is used for protecting voice-grade telephone lines, as well as relatively high-speed digital data lines such as DS1 paths. It is also suitable for protecting cassette inputs and outputs, as well as various consumer electronic and computer equipment.

Working Principle

The P4KE8.2A-E3/73 diode works by providing a fast, near-instantaneous current limit for over-voltage transients such as lightning or ESD. This protection is made possible by the device\'s low surge rating and fast response time. When the voltage across the device exceeds its breakdown voltage, it begins quickly limiting the current across the line and dissipates energy in the form of heat. When the voltage across the device returns to normal, the diode shuts off, allowing normal operation to resume.

The P4KE8.2A-E3/73 diode is designed to protect both positive and negative over-voltage conditions, reducing the chances of equipment or system damage due to surge or ESD. Its maximum surge rating is 8.2 amps, and its protected thermal dissipation is 5 watts, both of which make it suitable for many applications and short-duration energy surges.

Conclusion

In conclusion, the P4KE8.2A-E3/73 is a type of transient voltage suppression diode (TVS) used in telecommunications for protecting telephone lines and relatively high-speed digital data lines from over-voltage transients. It is a bidirectional unidirectional diode (BUD) that quickly limits current across the protection line and dissipates energy in the form of heat. Its maximum surge rating is 8.2 amps and its thermal dissipation is 5 watts, making it suitable for many applications and short-duration energy surges.

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