2N4856UB

Product Overview

Category

The 2N4856UB belongs to the category of field-effect transistors (FETs).

Use

It is commonly used as a general-purpose amplifier or switch in electronic circuits.

Characteristics

• Low noise figure
• High input impedance
• Moderate gain
• Wide dynamic range

Package

The 2N4856UB is typically available in TO-92 packaging.

Essence

This FET is essential for amplifying weak signals and switching high-frequency signals in various electronic applications.

Packaging/Quantity

The 2N4856UB is usually packaged in reels or tubes, with quantities varying based on manufacturer specifications.

Specifications

• Maximum Drain-Source Voltage: 40V
• Maximum Gate-Source Voltage: ±40V
• Continuous Drain Current: 10mA
• Power Dissipation: 350mW
• Operating Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The 2N4856UB has three pins: 1. Source (S) 2. Gate (G) 3. Drain (D)

Functional Features

• High input impedance allows for minimal loading of preceding stages.
• Low noise figure makes it suitable for low-noise amplifier applications.
• Can be used as a switch due to its ability to handle high-frequency signals.

Advantages

• Low noise figure enhances signal fidelity.
• High input impedance minimizes signal distortion.
• Versatile application in both amplification and switching circuits.

Disadvantages

• Moderate gain may require additional amplification stages in some applications.
• Limited maximum drain-source voltage compared to other FETs.

Working Principles

The 2N4856UB operates based on the control of current flow between the source and drain terminals through the manipulation of the gate-source voltage.

Detailed Application Field Plans

Audio Amplification

The 2N4856UB can be used in audio amplifiers to achieve low-noise amplification of weak audio signals.

RF Signal Switching

Due to its ability to handle high-frequency signals, the 2N4856UB is suitable for RF signal switching applications in communication systems.

Sensor Interface Circuits

Its high input impedance makes it ideal for interfacing with sensors to amplify and process weak sensor signals.

Detailed and Complete Alternative Models

• 2N4857UB
• J175
• BF245A

In conclusion, the 2N4856UB is a versatile field-effect transistor with applications in audio amplification, RF signal switching, and sensor interface circuits. Its low noise figure and high input impedance make it an attractive choice for various electronic designs, despite its moderate gain and limited maximum drain-source voltage. Additionally, alternative models such as the 2N4857UB, J175, and BF245A offer similar functionality for different design considerations.