5KP85A-HR Circuit Protection

TVS - Diodes

TVS diodes, also known as Transient Voltage Suppressors (TVS) are electronic components designed to protect electrical sensitive circuits or devices against over voltage transient impulses. The 5KP85A-HR TVS diode is a popular choice for many applications, due to its low capacitance, low leakage current, and high peak pulse current.

Application Field

The 5KP85A-HR is widely used for protecting small components like connectors, FPGAs, and ICs from electrostatic discharge and voltage spikes. It offers high peak surge current and low capacitance, making it an ideal choice for high-speed signal lines. It is also suitable for protecting automotive circuits against load dump or inductive kickback currents. Thanks to its small form factor it is also suitable for use in installations with limited space.

Working Principle

TVS diodes provide an additional layer of protection beyond the current limiting characteristics of linear or resistor devices. If a voltage transient high enough to exceed the rated breakover voltage of the 5KP85A-HR diode occurs, the diode will "breakover," meaning that it becomes conductive and diverts the transient current from the protected circuit. As the current passes through the diode it is then "clamped" to a lower level, protecting the attached circuit.

The 5KP85A-HR provides protection in two stages. First, it absorbs the initial surge which would otherwise cause damage, and then it acts as a shunt to divert the remaining current away from the protected circuit. As the current passes through the diode it creates a voltage drop across it, protecting the underlying circuit.

Additionally, the 5KP85A-HR has an adjustable response time, allowing it to be tailored to the specific application and requirements. The response time can be adjusted from a few nanoseconds up to a few hundred nanoseconds, allowing the diode to be tuned for the specific circuit needs, while still providing the necessary surge protection.

Conclusion

The 5KP85A-HR TVS diode is an effective device for protecting small components from ESD and voltage spikes. It is suitable for a wide range of applications due to its adjustable response time, low capacitance, and high peak current capabilities. With its small size, the 5KP85A-HR is an ideal choice when space is limited.