ON Semiconductor
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2N4123TFR
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2N4123TFR:

Product Overview: The 2N4123TFR is a versatile NPN bipolar junction transistor (BJT) that belongs to the category of electronic components. It is commonly used in amplification and switching applications due to its high gain and low noise characteristics. The transistor is typically packaged in a TO-92 package and is available in various quantities.

Specifications: - Type: NPN BJT - Package: TO-92 - Maximum Collector-Base Voltage: 40V - Maximum Collector Current: 200mA - Power Dissipation: 625mW - Transition Frequency: 250MHz

Detailed Pin Configuration: The 2N4123TFR features three pins: the emitter, base, and collector. In the TO-92 package, the pinout configuration is as follows: - Pin 1: Emitter - Pin 2: Base - Pin 3: Collector

Functional Features: - High current gain - Low noise - Wide frequency response - Suitable for audio amplification and switching applications

Advantages: - High gain - Low noise - Versatile applications - Compact TO-92 package

Disadvantages: - Limited power handling capability - Sensitive to temperature variations

Working Principles: The 2N4123TFR operates based on the principles of amplification and control of current flow. When a small current is applied to the base terminal, it controls the larger current flowing between the collector and emitter, allowing for signal amplification or switching functions.

Detailed Application Field Plans: The 2N4123TFR finds extensive use in audio amplification circuits, signal processing, and low-power switching applications. It is commonly employed in audio preamplifiers, oscillators, and low-frequency amplifiers due to its low noise characteristics and high gain.

Detailed and Complete Alternative Models: Alternative models to the 2N4123TFR include the 2N3904, BC547, and 2N2222. These transistors offer similar NPN BJT functionality and can be used as substitutes in various electronic circuits.

In conclusion, the 2N4123TFR is a widely used NPN BJT with applications in amplification and switching circuits. Its high gain, low noise, and compact package make it a popular choice for various electronic designs.

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  1. What is the 2N4123TFR transistor used for?

    • The 2N4123TFR is a general-purpose NPN bipolar junction transistor commonly used in amplification and switching applications.

  2. What are the key specifications of the 2N4123TFR transistor?

    • The 2N4123TFR has a maximum collector current of 200mA, a maximum collector-base voltage of 50V, and a maximum power dissipation of 625mW.

  3. How can I identify the pinout of the 2N4123TFR transistor?

    • The pinout of the 2N4123TFR transistor is typically identified as the emitter (E), base (B), and collector (C) when viewing the flat side with the leads pointing down.

  4. What are some common circuit configurations using the 2N4123TFR transistor?

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

  5. Can the 2N4123TFR be used for low-power applications?

    • Yes, the 2N4123TFR is suitable for low-power applications due to its moderate power dissipation and current ratings.

  6. Are there any specific considerations for driving the 2N4123TFR in high-frequency applications?

    • In high-frequency applications, it's important to consider the transistor's transition frequency and capacitances to ensure proper performance.

  7. What are the typical operating conditions for the 2N4123TFR transistor?

    • The 2N4123TFR operates within a temperature range of -65°C to 200°C and is designed for use in various electronic systems.

  8. Can the 2N4123TFR be used in audio amplifier circuits?

    • Yes, the 2N4123TFR can be utilized in small-signal audio amplifier circuits due to its amplification capabilities.

  9. What are the recommended biasing techniques for the 2N4123TFR transistor?

    • Common biasing techniques include fixed bias, emitter bias, and voltage-divider bias, depending on the specific application requirements.

  10. Where can I find detailed application notes and reference designs for the 2N4123TFR?

    • Detailed application notes and reference designs for the 2N4123TFR can often be found in the manufacturer's datasheets, application guides, and technical literature.