ON Semiconductor
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BC549C
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BC549C Transistor

Product Overview

Category

The BC549C transistor belongs to the category of small-signal NPN bipolar junction transistors.

Use

It is commonly used for amplification and switching purposes in electronic circuits.

Characteristics

  • Low power, low frequency amplifier
  • High current gain (hFE typically 200 to 800)
  • Low noise figure
  • Complementary PNP type available (BC559)

Package

The BC549C is typically available in a TO-92 package, which is a widely used through-hole package for transistors.

Essence

The essence of the BC549C lies in its ability to provide high current gain and low noise amplification in a compact form factor.

Packaging/Quantity

It is commonly available in reels or tubes with quantities ranging from hundreds to thousands per package.

Specifications

  • Collector-Emitter Voltage (VCEO): 30V
  • Collector-Base Voltage (VCBO): 30V
  • Emitter-Base Voltage (VEBO): 5V
  • Collector Current (IC): 100mA
  • Power Dissipation (PD): 500mW
  • Transition Frequency (ft): 150MHz

Detailed Pin Configuration

The BC549C transistor has three pins: 1. Emitter (E): This is the pin that emits or releases electrons into the base. 2. Base (B): The base controls the flow of electrons from the emitter to the collector. 3. Collector (C): This pin collects the electrons emitted by the emitter.

Functional Features

  • High current gain allows for small input signals to control larger output signals.
  • Low noise figure makes it suitable for audio amplification applications.
  • Good linearity and frequency response.

Advantages and Disadvantages

Advantages

  • High current gain
  • Low noise figure
  • Wide availability
  • Complementary PNP type (BC559) available for push-pull amplifier configurations

Disadvantages

  • Relatively low collector current compared to other transistors
  • Limited power dissipation capability

Working Principles

The BC549C operates based on the principles of bipolar junction transistors, where a small current at the base terminal controls a much larger current between the collector and emitter terminals. It amplifies the input signal and can be used as a switch in digital applications.

Detailed Application Field Plans

The BC549C is commonly used in the following applications: - Audio amplifiers - Signal processing circuits - Switching circuits - Oscillator circuits

Detailed and Complete Alternative Models

Some alternative models to the BC549C include: - 2N3904 - BC547 - 2SC945 - 2N2222

In conclusion, the BC549C transistor is a versatile component with a wide range of applications in electronics due to its high current gain, low noise figure, and compact package size.

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Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням BC549C у технічних рішеннях

  1. What is the BC549C transistor used for?

    • The BC549C is a general-purpose NPN bipolar junction transistor commonly used in amplification and switching applications.

  2. What are the typical operating conditions for the BC549C?

    • The BC549C typically operates at a maximum collector current of 100mA, with a maximum collector-emitter voltage of 30V.

  3. Can the BC549C be used for audio amplification?

    • Yes, the BC549C can be used for small-signal audio amplification due to its low noise and high gain characteristics.

  4. Is the BC549C suitable for low-power switching applications?

    • Yes, the BC549C can be used for low-power switching applications such as signal switching in electronic circuits.

  5. What are the key features of the BC549C transistor?

    • The BC549C features low noise, high current gain, and low power dissipation, making it suitable for various technical solutions.

  6. Are there any specific considerations for using the BC549C in high-frequency applications?

    • The BC549C may not be suitable for high-frequency applications due to its limited frequency response and transition frequency.

  7. Can the BC549C be used in temperature-sensitive environments?

    • The BC549C has a moderate temperature range and can be used in typical electronic environments, but may not be suitable for extreme temperature conditions.

  8. What are some common alternatives to the BC549C transistor?

    • Common alternatives to the BC549C include the 2N3904, 2N2222, and BC547 transistors, which offer similar characteristics and performance.

  9. Does the BC549C require any specific biasing arrangements?

    • The BC549C typically requires standard NPN transistor biasing arrangements, such as base resistor and collector load resistor configurations.

  10. Where can I find detailed specifications and application notes for the BC549C?

    • Detailed specifications and application notes for the BC549C can be found in the manufacturer's datasheet and technical documentation, as well as in electronics reference books and online resources.