Allicdata Part #: | 2N3821-ND |
Manufacturer Part#: |
2N3821 |
Price: | $ 18.87 |
Product Category: | Discrete Semiconductor Products |
Manufacturer: | Microsemi Corporation |
Short Description: | N CHANNEL JFET |
More Detail: | JFET N-Channel 50V 300mW Through Hole TO-72 |
DataSheet: | 2N3821 Datasheet/PDF |
Quantity: | 1000 |
100 +: | $ 17.14780 |
Series: | Military, MIL-PRF-19500/375 |
Packaging: | Bulk |
Part Status: | Active |
FET Type: | N-Channel |
Voltage - Breakdown (V(BR)GSS): | 50V |
Drain to Source Voltage (Vdss): | 50V |
Current - Drain (Idss) @ Vds (Vgs=0): | 2.5mA @ 15V |
Voltage - Cutoff (VGS off) @ Id: | 4V @ 0.5nA |
Input Capacitance (Ciss) (Max) @ Vds: | 6pF @ 15V |
Power - Max: | 300mW |
Operating Temperature: | -55°C ~ 200°C (TJ) |
Mounting Type: | Through Hole |
Package / Case: | TO-206AF, TO-72-4 Metal Can |
Supplier Device Package: | TO-72 |
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Transistors - JFETs: 2N3821 Application Field and Working Principle
The 2N3821 is a commonly used N-channel junction field-effect transistor (JFET), used mainly in audio and general low-level signal processing applications. Short for junction field-effect transistor, JFETs are voltage-controlled devices that consist of an intrinsic channel between two gate electrodes. JFETs are known for their high input impedance, low noise and high transconductance.
2N3821 is a transistor with an N-channel junction FET design, making it suitable for many low-level signal processing applications. The main characteristics that make the 2N3821 different from other JFETs are its high transconductance and high voltage gain, allowing it to be used in many audio applications. It is also used for voltage regulation and power control in many devices.
The 2N3821 works by using a voltage difference between the source and drain electrodes to control the flow of current from the source to the drain. Essentially, it uses a voltage-dependent gate-to-source resistance, which controls the amount of current that flows through the device. When the voltage at the gate goes up, the resistance decreases, allowing more current to flow through the device. Conversely, when the voltage decreases, the resistance increases, and less current flows through the device.
2N3821 is mainly used in amplifier circuits, as it has extremely high gain and transconductance, making it ideal for low-noise amplification. It can be used to amplify signals in audio, radio and telecommunications devices such as routers and cameras, as well as power control applications in automotive, consumer electronics and industrial systems.
Since the 2N3821 is a voltage-controlled device, it is important to ensure the right voltage is provided to the gate. Too high a voltage can cause excessive current to flow through the device, potentially damaging the device. On the other hand, too low a voltage can result in weak signal amplification and poor performance. The voltage should always be kept within the correct operating range for optimum performance.
In conclusion, the 2N3821 is a commonly used N-channel JFET, with excellent performance characteristics for low-noise audio amplifier and power control applications. It has a high transconductance and voltage gain, allowing it to be used in many amplifying and voltage regulation applications. As it is voltage-controlled, it is important to ensure the right voltage is provided to the gate to prevent damage or poor performance.
The specific data is subject to PDF, and the above content is for reference
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