2N4339

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
FET Type:	N-Channel
Voltage - Breakdown (V(BR)GSS):	50V
Current - Drain (Idss) @ Vds (Vgs=0):	500µA @ 15V
Voltage - Cutoff (VGS off) @ Id:	600mV @ 100nA
Input Capacitance (Ciss) (Max) @ Vds:	7pF @ 15V
Power - Max:	300mW
Operating Temperature:	-55°C ~ 175°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-206AA, TO-18-3 Metal Can
Supplier Device Package:	TO-206AA (TO-18)

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Introduction2N4339 is a N-Channel JFET that is designed for use in switching and amplifier applications for low-current, low-power, and low-voltage operations. The device is made up of two N-type semiconductor source, drain, and gate regions. The source and drain are connected, creating a linear region of operation. The gate of the device is separated from the rest of the device by an oxide layer, which serves as the gate dielectric. The N-channel JFET has a high input impedance and a high current gain, making it an excellent choice for low-noise, low-power, and low-voltage applications. The device is commonly used in audio applications such as amplifiers and as switches for low-current applications such as computers. Working Principle The working principle of the 2N4339 is based upon its construction. This type of JFET relies on a potential difference between its drain and source in order to allow current to flow from source to drain. By applying an operating voltage between the drain and source, a certain current will flow from source to drain, creating a voltage drop across the device.The gate dielectric prevents current from flowing from the gate to the channel, instead allowing it to flow from the drain to the source, creating a linear relationship between the gate–source voltage and the drain–source voltage. This is how the device works; by applying an operating voltage between the drain and source and a control voltage to the gate, a certain current flow can be established. Application Field The 2N4339 is one of the most widely used N-channel JFETs available. It is great for low current and low voltage amplification and switching applications. For example, it can be used in audio amplifiers, preamplifiers, voltage regulators, power supplies, and other low-noise and low-power applications. Additionally, it can be used in computer circuits and other low-voltage switching applications. The device is also useful in power-supply noise cancellations and AC/DC converters. It can be used in both switching and linear applications. Some applications that require a high input impedance, such as preamplifiers, use the 2N4339 due to its high input impedance. ConclusionIn conclusion, the 2N4339 is a popular N-Channel JFET. It is designed for low-current, low-power, and low-voltage switching and amplifier applications. Its highly efficient construction allows it to provide a high input impedance and a high current gain. Thanks to its compatibility with a wide range of applications, it is one of the most commonly used JFETs available. Its applications include audio amplifiers, video amplifiers, AC/DC converters, and power supply noise cancellation.

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