Series:	--
Packaging:	Tape & Box (TB)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	13V
Tolerance:	±5%
Power - Max:	1W
Impedance (Max) (Zzt):	10 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 9.9V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	200°C
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-41

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Diodes - Zener - Single: 1N4743ATA application field and working principle

1N4743ATA is a kind of single Zener diode, which is widely used in many fields of applications and is considered as an industry standard device. This device has a particularly low dynamic and relatively low leakage current, high electrical stability and very rapid recovery time. These features enable the device to function properly in the below application fields.

Application Fields:

Regulated Power Supplies

The devices can be used in regulated power supplies as a key element to regulate the voltage. They offer very high electrical stability, low operational cost and quick response. Additionally, 1N4743ATA are able to handle high current power needs, thus suitable for many types of regulated power supply application.

Voltage Regulators

1N4743ATA diodes are also mainly used in conjunction with other components in voltage regulator circuits. The diodes fast recovery time helps it to react very quickly in case of over-voltage or underload situations, protecting the circuit from any potential damage. Furthermore, the low leakage current helps in controlling power dissipation and ensuring a better performance of the circuit.

Clamping Devices

The 1N4743ATA can be used as clamping devices in voltage protection circuits because of their fast response time, high electrical stability and lower leakage current. It’s able to detect any over-voltage or under-voltage situation and react quickly to protect the circuit from any potential damage.

Working Principle:

The 1N4743ATA works based on the principle of a zener effect, which is a combination of electron emissions and the recombination of electrons and holes. A conventional silicon diode is reverse biased and connected in a circuit, when electrons in the diode become free and diffused across the junction barrier due to the electric field they create a space charge layer.The space charge layer is the main reason for the reverse conduction, which allows the forward current to flow in the reverse direction, which is known as avalanche breakdown. This process continues as long as the applied reverse voltage is greater than the threshold voltage of the diode, which is typically 5V.At the same time, when the applied bias exceeds a certain internal potential, current flows through the PN junction; this is the reverse bias mechanism. Thus, the1N4743ATA semiconductor works as a voltage regulator across the range of its current rating. The descending voltage characteristics of the diode allow it to provide better performance of the circuit.

Conclusion:

In conclusion, the 1N4743ATA offers a range of advantages for its application in power supplies and as a key element in voltage regulator circuits. It is fast and extremely stable, offering a low leakage current. It offers a fast recovery time ensuring that it can protect the circuit from any overvoltage or underload situations. Furthermore, when connected in electric and electronic circuits, it performs a reverse biasing mechanism, which continually regulates the flow of current, providing a stable output. 1N4743ATA is a popular application device that has made it a veritable industry standard.

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