2N4391 Transistor

Product Overview

The 2N4391 is a field-effect transistor (FET) belonging to the category of small-signal transistors. It is commonly used for amplification and switching applications due to its high input impedance, low noise, and low power consumption characteristics. The 2N4391 is typically packaged in a TO-18 metal can package and is available in various quantities.

Basic Information

• Category: Small-signal transistor
• Use: Amplification and switching
• Characteristics: High input impedance, low noise, low power consumption
• Package: TO-18 metal can
• Packaging/Quantity: Available in various quantities

Specifications

The 2N4391 transistor has the following specifications: - Maximum Drain-Source Voltage: 40V - Maximum Gate-Source Voltage: ±40V - Continuous Drain Current: 50mA - Total Power Dissipation: 350mW - Operating Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The 2N4391 transistor has three pins: 1. Gate (G): Controls the conductivity between the source and drain terminals. 2. Drain (D): Collects the current when the transistor is in the "on" state. 3. Source (S): Emits the current flow from the transistor.

Functional Features

The 2N4391 transistor offers the following functional features: - High input impedance allows for minimal loading of the signal source. - Low noise characteristics make it suitable for low-level amplification applications. - Low power consumption makes it energy-efficient.

Advantages and Disadvantages

Advantages

• High input impedance
• Low noise
• Low power consumption

Disadvantages

• Limited maximum drain-source voltage
• Moderate continuous drain current capacity

Working Principles

The 2N4391 operates based on the field-effect principle, where the conductivity between the source and drain terminals is controlled by the voltage applied to the gate terminal. When a positive voltage is applied to the gate, it creates an electric field that modulates the conductivity between the source and drain, allowing for amplification or switching of the current flow.

Detailed Application Field Plans

The 2N4391 transistor finds extensive use in the following application fields: - Audio amplifiers - Low-frequency signal amplification - Switching circuits - Oscillator circuits

Detailed and Complete Alternative Models

Some alternative models to the 2N4391 transistor include: - J310 FET - 2N5457 FET - MPF102 FET - BF256B FET

In conclusion, the 2N4391 transistor is a versatile component with high input impedance, low noise, and low power consumption characteristics, making it suitable for various amplification and switching applications across different industries.

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