5KP85A-E3/73 Circuit Protection

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TVS-Diodes are used to protect electronic circuitry from damage due to transient voltage. They provide a fast, reliable and affordable form of protection to the sensitive components of circuits from high voltage pulses and transient spikes. The 5KP85A-E3/73 is one of the most common TVS Diodes used for these applications.

Application Field of 5KP85A-E3/73

The 5KP85A-E3/73 is primarily used in AC power lines, telecommunications systems, digital communication systems, power sources, and industrial control systems. It is designed to provide protection against surges caused by lightning and other electrical hazards, such as high-voltage spikes, induction, working-through of shields, and uncontrolled motor operation. The 5KP85A-E3/73 can also be used for overvoltage protection of data lines such as RS-232 and USB lines.

Working Principle of 5KP85A-E3/73

The 5KP85A-E3/73 is a dual-diode array voltage suppressor. The device is designed to protect against high-voltage pulses by clamping the voltage across the diode to a safe level. It works by allowing a small current to flow through its low-voltage rectifier diode and thus clamps the voltage across the diode to the breakdown voltage. The device also ensures that the voltage across the other diode never exceeds its breakdown voltage. This action prevents the reverse-biased diode from entering avalanche during high-voltage transients.

During normal operation, the 5KP85A-E3/73 will be biased by a forward-bias voltage, which will cause the diode to be forward-biased and operating at its rated breakdown voltage. When a high-voltage transient is detected, current will start to flow through the device, and the low-voltage rectifier diode will clamp the voltage to a safe level. The device will then clamp the voltage across the other diode to the rated breakdown voltage, thus providing protection for the circuit.

Conclusion

In conclusion, 5KP85A-E3/73 is an effective and affordable TVS diode used to protect electronic circuits from transient voltage. The device is designed to provide protection against high-voltage spikes, induction, working-through of shielding, and uncontrolled motor operation. It can also be used for overvoltage protection of data lines such as RS-232 and USB lines. Its working principle involves clamping the voltage across the diode to a safe level and ensuring that the voltage across the other diode does not exceed its breakdown voltage.

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