1N4742P/TR8

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	12V
Tolerance:	±10%
Power - Max:	1W
Impedance (Max) (Zzt):	9 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 9.1V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-204AL (DO-41)
Base Part Number:	1N4742

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1N4742P/TR8 Diodes - Zener - Single Application Field and Working Principle

1N4742P/TR8 is a type of single Zener diodes, which has a variety of applications in the manufacturing industry. It is used to regulate electrical currents and voltages, protect against over-voltage, and supply stable output voltage. This paper will discuss the application field and working principle of 1N4742P/TR8 diodes in detail.

Application Field

The 1N4742P/TR8 is an industry standard 5.1V Zener diode specially designed for voltage regulating purposes. It is widely used in various applications, such as voltage regulation in power supplies, over-voltage protection of equipment, and surge absorption.The 1N4742P/TR8 is often employed in circuit designs for cell phone power management, automotive power supplies, computer power supplies, etc. It is also used as a low-power device for tilt switches, temperature compensation, and other general-purpose applications.

Working Principle

The 1N4742P/TR8 is a type of voltage-regulating diode based on the Zener effect. It consists of single N-type semiconductor material with an active region, which can control the current flow through a basic forward-biased diode junction. The Zener region is formed by the junction of an intrinsic layer of semiconductor material and a heavily doped P-region.When the reverse bias voltage is applied to the Zener diode, the Zener action occurs and will keep the output voltage at a constant level. This voltage drop is known as the "Zener voltage". The 1N4742P/TR8 diode is designed with a Zener voltage of 5.1V and a maximum power dissipation rating of 500mW.When a forward-biased voltage is applied to the 1N4742P/TR8 diode, it acts as a normal ideal diode, allowing current to flow through it. In this state, the forward voltage drop is slightly greater than the Zener voltage. The 1N4742P/TR8 diode also provides an avalanche breakdown voltage of 17V.

Conclusion

In conclusion, the 1N4742P/TR8 is a type of single Zener diode with a wide range of applications. It is primarily used to regulate the voltage flow across circuits and to protect against over-voltage, while also providing a stable output voltage. The working principle of the 1N4742P/TR8 diode is based on the Zener effect with a Zener voltage of 5.1V and an avalanche breakdown voltage of 17V.

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