BZX84C2V7-7

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Discontinued at Digi-Key
Voltage - Zener (Nom) (Vz):	2.7V
Tolerance:	±7%
Power - Max:	300mW
Impedance (Max) (Zzt):	100 Ohms
Current - Reverse Leakage @ Vr:	20µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	900mV @ 10mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3
Base Part Number:	BZX84C2V7

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Introduction to BZX84C2V7-7

BZX84C2V7-7, a single diode, is a subfamily of Zener diodes. A Zener diode is a special type of diode that allows current to flow from anode to cathode when voltage is applied in the forward direction, like a normal diode, but also allows it to flow in the reverse direction if the voltage is above what is known as the “Zener voltage.”BZX84C2V7-7 is specifically made with a voltage breakdown of 4.7V, which makes it useful in many applications. It is constructed using silicon technology and is capable of sustaining a peak reverse power dissipation of 500 milliwatts. This reliable component is built with thin film technology and offers a wide operating temperature range from –30 °C to +85 °C.

Application Field of BZX84C2V7-7

BZX84C2V7-7’s 4.7V breakdown voltage attracts electronics engineers to use it in different applications including noise suppression, voltage regulation, clamping, and destructive overvoltage protection. This component is typically used to supply a constant voltage to active electronics following a wide variety of devices, from power supplies to vacuum tubes, from radio receivers to instrumentation, from use by technicians to engineers, and from automotive devices to home electronics.

Noise Suppression

BZX84C2V7-7’s superior noise and surge protection in RF applications makes it useful as a noise suppression device. It is typically placed in parallel with normal operating current paths, allowing the component to limit voltage by temporarily allowing reverse current flow when the current exceeds the specified value.

Voltage Regulation

BZX84C2V7-7 can be used to regulate voltage in electronic systems. Its wide breakdown voltage range makes it ideal for use in linear power supply regulators, where it is placed in parallel with the load to provide controlled conduction. This allows for the supply of a constant voltage to the device, thereby providing a regulated output voltage to the load.

Clamping

This diode is often used for application such as TV or monitor protection from the voltage spikes from AC power lines or from lightning strikes. In both cases, BZX84C2V7-7 works as a cushion, absorbing and redirecting the excess voltage away from the vulnerable devices.

Destructive Overvoltage Protection

In order to protect sensitive electronic circuits, BZX84C2V7-7 is often used as a protective device. It is placed in parallel with the load, so that it can divert excessive voltage away from the circuit and safely ground it. This ensures that the circuit is protected from any accidental destruction due to an overexposure of voltage.

Working Principle of BZX84C2V7-7

BZX84C2V7-7 works on the principle of Zener breakdown which enables it to conduct electrical current in both directions. Thus, the Zener diode\'s conduction in the reverse direction is what makes it useful for voltage regulation, noise suppression and overvoltage protection.The operation of the BZX84C2V7-7 is such that when a positive voltage is applied to the diode such that it is greater than the breakdown or \'Zener\' voltage, current starts to flow from the anode to the cathode. As the voltage continues to rise, the flow of current also increases. This current is known as the Zener current.This can be explained using the concept of reverse conductivity when a voltage is greater than the Zener voltage, the electrons present in the P side of the diode start moving towards the N side. As the electrons gain kinetic energy, they are able to break through the covalent bonds and cross the depletion layer. Thus, a large amount of current is allowed to flow from the P side to N side of the diode, which is the Zener current. The flow of this Zener current keeps on increasing as the increase in voltage until it reaches a point where it becomes constant, no matter the increase in voltage. This point is known as the Zener knee. This is the point where the diode reaches its maximum current handling capability and starts to act as a voltage regulator.

Conclusion

In conclusion, BZX84C2V7-7 is an effective Zener diode capable of regulating voltage. It works on the principle of Zener breakdown and its 4.7V breakdown voltage makes it a great choice for applications such as noise suppression, voltage regulation, clamping, and destructive overvoltage protection.

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