2N4391-E3

Product Overview

Category:

The 2N4391-E3 belongs to the category of field-effect transistors (FETs).

Use:

It is commonly used as a small-signal amplifier or switch in electronic circuits.

Characteristics:

• Low noise figure
• High input impedance
• Low power consumption

Package:

The 2N4391-E3 is typically available in TO-92 packaging.

Essence:

This FET is essential for amplifying weak signals and controlling the flow of current in electronic devices.

Packaging/Quantity:

It 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: 50mA
• Power Dissipation: 350mW
• Operating Temperature Range: -55°C to 150°C

Detailed Pin Configuration

The 2N4391-E3 has three pins: Gate (G), Drain (D), and Source (S).

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 voltage-controlled resistor in some circuit configurations.

Advantages and Disadvantages

Advantages

• Low noise figure
• High input impedance
• Versatile application in various electronic circuits

Disadvantages

• Limited maximum drain-source voltage
• Relatively low continuous drain current rating

Working Principles

The 2N4391-E3 operates based on the field effect, where the voltage applied to the gate terminal controls the conductivity between the source and drain terminals.

Detailed Application Field Plans

Audio Amplification

The 2N4391-E3 can be used in audio amplifier circuits due to its low noise figure and high input impedance, which are crucial for maintaining signal fidelity.

Signal Switching

In electronic switching applications, this FET can control the flow of signals with minimal distortion, making it suitable for use in signal routing circuits.

Detailed and Complete Alternative Models

• J310
• 2N5457
• BF256B
• MPF102

In conclusion, the 2N4391-E3 is a versatile field-effect transistor with characteristics that make it suitable for various small-signal amplification and switching applications. Its low noise figure and high input impedance contribute to its widespread use in electronic circuits, although designers should consider its limitations in maximum voltage and current ratings when selecting alternative models for specific applications.

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