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2N4900

2N4900 Transistor

Product Overview

Category:

The 2N4900 is a general-purpose NPN bipolar junction transistor (BJT).

Use:

It is commonly used for amplification and switching of electronic signals.

Characteristics:

  • Low power dissipation
  • High current gain
  • Medium voltage capability

Package:

The 2N4900 is typically available in a TO-92 package.

Packaging/Quantity:

It is usually sold in reels or tubes containing multiple units.

Specifications

  • Collector-Base Voltage (VCBO): 60V
  • Collector-Emitter Voltage (VCEO): 40V
  • Emitter-Base Voltage (VEBO): 6V
  • Collector Current (IC): 200mA
  • Power Dissipation (PD): 625mW
  • Transition Frequency (ft): 150MHz
  • Operating Temperature Range: -65°C to 200°C

Detailed Pin Configuration

The 2N4900 transistor has three pins: 1. Collector (C) 2. Base (B) 3. Emitter (E)

Functional Features

The 2N4900 transistor offers the following functional features: - Amplification of weak electronic signals - Switching of electronic circuits - Reliable performance in low-power applications

Advantages and Disadvantages

Advantages

  • High current gain
  • Low power dissipation
  • Versatile applications in amplification and switching circuits

Disadvantages

  • Limited voltage and current ratings compared to other transistors
  • Sensitive to temperature variations

Working Principles

The 2N4900 operates based on the principles of bipolar junction transistors, where the flow of current is controlled by the application of a small signal at the base terminal, resulting in amplified output at the collector terminal.

Detailed Application Field Plans

The 2N4900 transistor finds extensive use in various electronic applications, including: - Audio amplifiers - Signal processing circuits - Switching regulators - Oscillator circuits

Detailed and Complete Alternative Models

Some alternative models to the 2N4900 include: - 2N2222 - BC547 - 2N3904 - PN2222

In conclusion, the 2N4900 transistor is a versatile component with applications in amplification and switching circuits. Its low power dissipation and high current gain make it suitable for a wide range of electronic designs.

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技術ソリューションにおける 2N4900 の適用に関連する 10 件の一般的な質問と回答をリストします。

  1. What is the 2N4900 transistor used for?

    • The 2N4900 transistor is commonly used for amplification and switching applications in electronic circuits.

  2. What are the key specifications of the 2N4900 transistor?

    • The 2N4900 is a general-purpose NPN bipolar junction transistor (BJT) with a maximum collector current of 200mA, a maximum collector-base voltage of 40V, and a maximum power dissipation of 625mW.

  3. How can I use the 2N4900 transistor as a switch?

    • The 2N4900 can be used as a switch by biasing it into either cutoff or saturation regions based on the base current to control the collector current flow.

  4. What are some typical circuit configurations using the 2N4900 transistor?

    • Common circuit configurations include common emitter amplifiers, emitter followers, and various switching circuits.

  5. What are the temperature considerations when using the 2N4900 transistor?

    • The 2N4900 has a maximum operating temperature of 150°C, so thermal management is important to ensure reliable performance.

  6. Can the 2N4900 be used in audio amplifier circuits?

    • Yes, the 2N4900 can be used in small signal audio amplifier circuits due to its low noise and high gain characteristics.

  7. What are the typical applications of the 2N4900 in technical solutions?

    • The 2N4900 is commonly used in audio amplifiers, signal processing circuits, switching applications, and general purpose electronic designs.

  8. How do I calculate the base resistor value for driving the 2N4900 transistor?

    • The base resistor value can be calculated using Ohm's law and the desired base current to ensure proper biasing of the transistor.

  9. What are the alternatives to the 2N4900 transistor?

    • Alternatives to the 2N4900 include similar NPN transistors such as the 2N2222, BC547, and PN2222.

  10. Are there any specific precautions to consider when using the 2N4900 in technical solutions?

    • It's important to avoid exceeding the maximum ratings of the transistor, provide adequate heat sinking if necessary, and ensure proper biasing to prevent damage and ensure reliable operation.