1N4731AUR

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The 1N4731AUR is a single, 5.1-volt, 0.5-watt, Zener diode. It is a two-terminal device that can provide any required Zener voltage range from 6.8 to 200 volts. The 1N4731AUR’s structure and design provide exceptional temperature stability, power handling capacity, and immunity to surface leakage. This Zener diode is manufactured in the SOT23package. Moreover, the 1N4731AUR is designed to handle peak current up to 1 Amp. The wide range of operating temperatures, low leakage current additives, and high level of tolerance ensure device reliability.

Application Field of Zener Diode 1N4731AUR

The 1N4731AUR is used in a multitude of applications, such as voltage regulation and clamping for protecting digital logic and Analog devices from overvoltage, transient protection, signal coupling, reverse bias polarity protection, or voltage reference components. This Zener diode is also employed in Inverter, DC/DC converter, solar system and other power systems.

Working Principle of Zener Diode 1N4731AUR

All Zener diodes are basically made of two distinct junctions, an Anode (A)and a Cathode (K). The Anode is connected to the positive terminal or the load side, while the Cathode is connected to the negative terminal or the ground side of a circuit. Under normal operation, the majority of the electrical current will pass through the Anode so its terminal will be at the higher reference potential than the cathode. The forward bias voltage is applied to the Anode while the reverse bias voltage is applied to the Cathode.

In Zener diodes, the PN junction is made to break down at a predefined reverse bias voltage level, that is the Zener voltage. At this voltage level, the depletion layer will partially vanish and current will pass through it with little resistance. This is known as Zener breakdown. This enables current to flow in the reverse direction which is known as the Zener effect.

In the case of the 1N4731AUR Zener diode, as the applied peak reverse bias voltage (reverse operating voltage) is 0.5W, 5.1V, the flow of current will be through the PN junction. The Zener diode will breakdown at 5.1V, the voltage level will remain constant, and a huge amount of current will pass through it. At the same time, it will provide the required constant voltage input for voltage regulation or voltage clamping for Digital and Analog components.

Conclusion

The 1N4731AUR Zener diode is an excellent solution for voltage regulation and voltage clamping for Digital and Analog components. It is designed for peak current up to 1 Amp and it can handle wide range of operating temperatures. It is widely used in Inverter, DC/DC converter, solar system and other power systems. Furthermore, its structure and design provide exceptional temperature stability, power handling capacity and immunity to surface leakage.

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