1N4776

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	8.5V
Tolerance:	±5%
Power - Max:	500mW
Impedance (Max) (Zzt):	200 Ohms
Operating Temperature:	0°C ~ 75°C
Mounting Type:	Through Hole
Package / Case:	DO-204AH, DO-35, Axial
Supplier Device Package:	DO-35

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Diodes - Zener - Single: 1N4776 Application Field and Working Principle

The 1N4776 diode Zener single is a commonly used medium power device. It offers 600mW reverse power handling and features a wide operating temperature range, making it suitable for a variety of applications. This article examines the applications fields and working principles of 1N4776 diodes.

Overview of 1N4776

The 1N4776 single Zener diode, manufactured by Vishay, is part of a range of 500mA, medium power Zener diodes with a wide operating temperature range of -65°C to +125°C. It offers an average forward current of 1A and a maximum Zener diode impedance of 0.7V at 70°C. It is typically supplied in packages ranging from 0805 to 1206 sizes.

Applications of 1N4776

1N4776 diodes are primarily used for applications requiring stabilization of voltage, such as over voltage protection and reference voltage sources. Moreover, the device is suitable for use in voltage regulators, power supplies and signal conditioning circuits. Its high-reliability and wide operating temperature range also make it ideal for use in automobile and aerospace electronic systems.

Working Principle of 1N4776

Like all Zener diodes, the 1N4776 operates by using the spontaneous flow of charge carriers across a reverse-biased PN junction. When a reverse voltage is applied to the diode, the voltage at the junction is exceeded, generating a strong electric field in the region that accelerates electrons and holes across the junction. The resulting flow of carriers causes a significant decrease in the junction voltage. The applied voltage at which this breakdown occurs is referred to as the Zener voltage, or Vz. In the 1N4776 single Zener diode, when the applied voltage is greater than the Vz, a large current will flow and the voltage across the diode will remain almost constant. If the Zener diode has a positive temperature coefficient (PTC) then its Vz will increase with temperature. This ensures that the diode will operate reliably and the output voltage will remain within a predetermined range.

Conclusion

The 1N4776 single Zener diode is an ideal choice for a range of applications due to its wide operating temperature range, high reliability and low cost. It is used for applications such as over voltage protection, reference voltage sources, voltage regulators, power supplies and signal conditioning circuits. Due to the spontaneous flow of charge carriers across a reverse-biased PN junction, the output voltage is maintained at a stable level.

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