Microsemi Corporation
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2N2904
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2N2904 Transistor

Product Overview

The 2N2904 is a bipolar junction NPN transistor commonly used in electronic circuits. It falls under the category of small-signal transistors and is widely utilized for amplification, switching, and voltage regulation applications. Known for its high frequency and low power capabilities, the 2N2904 comes in a variety of packages such as TO-92, SOT-23, and SOT-223, making it versatile for different circuit designs. This transistor is essential in various electronic devices due to its reliability and performance.

Package and Quantity

The 2N2904 is available in various packages including TO-92, SOT-23, and SOT-223. The quantity per package may vary depending on the manufacturer and distributor.

Specifications

  • Maximum Collector-Emitter Voltage: 40V
  • Maximum Collector-Base Voltage: 60V
  • Maximum Emitter-Base Voltage: 5V
  • Continuous Collector Current: 0.6A
  • Power Dissipation: 600mW
  • Transition Frequency: 250MHz
  • Operating Temperature Range: -65°C to 200°C

Detailed Pin Configuration

The 2N2904 transistor typically consists of three pins: the emitter, base, and collector. In a TO-92 package, the pin configuration is as follows: - Pin 1: Emitter - Pin 2: Base - Pin 3: Collector

Functional Features

The 2N2904 transistor offers high current gain, low noise, and excellent linearity, making it suitable for audio amplification and signal processing applications. Its compact size and compatibility with various circuit configurations make it a preferred choice for many electronic designers.

Advantages and Disadvantages

Advantages

  • High current gain
  • Low noise
  • Compact size
  • Versatile packaging options

Disadvantages

  • Limited maximum collector current
  • Moderate power dissipation capability

Working Principles

The 2N2904 operates based on the principles of bipolar junction transistors, where the flow of current between the collector and emitter is controlled by the current flowing into the base terminal. By modulating the base current, the transistor can amplify or switch electronic signals effectively.

Detailed Application Field Plans

The 2N2904 transistor finds extensive use in the following applications: - Audio amplifiers - Signal processing circuits - Voltage regulators - Oscillator circuits - Switching circuits

Detailed and Complete Alternative Models

Some alternative models to the 2N2904 include: - 2N2222 - BC547 - 2N3904 - PN2222

In conclusion, the 2N2904 transistor is a versatile component that plays a crucial role in various electronic circuits, offering high performance and reliability. Its compact size, functional features, and wide range of applications make it an indispensable part of modern electronic design.

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Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af 2N2904 i tekniske løsninger

  1. What is the 2N2904 transistor used for?

    • The 2N2904 is a general-purpose NPN bipolar junction transistor commonly used for amplification and switching applications.

  2. What are the typical operating conditions for the 2N2904?

    • The 2N2904 transistor typically operates at a maximum collector current of 600mA, with a maximum collector-emitter voltage of 40V.

  3. How do I identify the pinout of the 2N2904 transistor?

    • The pinout of the 2N2904 transistor is typically Emitter (E), Base (B), and Collector (C).

  4. Can the 2N2904 be used for audio amplification?

    • Yes, the 2N2904 can be used for small-signal audio amplification due to its low noise and high gain characteristics.

  5. What are some common circuit configurations using the 2N2904?

    • Common circuit configurations include common emitter amplifiers, switch circuits, and oscillator circuits.

  6. What are the key parameters to consider when designing with the 2N2904?

    • Key parameters include the maximum collector current, maximum power dissipation, and current gain (hFE) of the transistor.

  7. Can the 2N2904 be used in high-frequency applications?

    • While the 2N2904 can be used in moderate frequency applications, it may not be suitable for very high-frequency designs due to its transition frequency limitations.

  8. Are there any common alternatives to the 2N2904 transistor?

    • Common alternatives include the 2N2222, BC547, and BC548 transistors, which have similar characteristics and can be used as substitutes in many applications.

  9. What are the typical thermal considerations for the 2N2904?

    • Thermal considerations include ensuring proper heat sinking if the transistor is expected to dissipate significant power to avoid overheating.

  10. Where can I find detailed datasheets and application notes for the 2N2904?

    • Detailed datasheets and application notes for the 2N2904 can be found on semiconductor manufacturer websites or electronics component distributor websites.