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2N3904BU
Product Overview
The 2N3904BU is a general-purpose NPN bipolar junction transistor (BJT) belonging to the category of discrete semiconductors. It is commonly used for amplification and switching purposes in various electronic circuits. The transistor exhibits characteristics such as low noise, high current capability, and moderate voltage ratings. It is typically available in a small plastic package with three leads and is widely used in consumer electronics, industrial control systems, and telecommunications equipment.
Package: TO-92
Packaging/Quantity: Bulk or Tape & Reel
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): 300MHz
- Operating Temperature Range: -55°C to 150°C
Detailed Pin Configuration
The 2N3904BU transistor has three pins: 1. Emitter (E): Connected to the N-type material. 2. Base (B): Controls the flow of current between the emitter and collector. 3. Collector (C): Collects the majority charge carriers.
Functional Features
The 2N3904BU transistor offers high current gain, low saturation voltage, and fast switching speed, making it suitable for various amplification and switching applications. Its compact size and robust construction make it ideal for use in space-constrained electronic designs.
Advantages and Disadvantages
Advantages: - High current gain - Low noise - Fast switching speed
Disadvantages: - Moderate power dissipation capability - Limited voltage and current ratings
Working Principles
When a small current flows into the base terminal, it controls a much larger current flowing between the collector and emitter terminals. This property allows the transistor to amplify signals or act as a switch in electronic circuits.
Detailed Application Field Plans
The 2N3904BU transistor finds extensive use in the following applications: - Audio amplifiers - Signal processing circuits - Switching circuits - Oscillator circuits - Sensor interfaces
Detailed and Complete Alternative Models
Some alternative models to the 2N3904BU include: - BC547 - 2N2222 - PN2222 - 2N4401
In conclusion, the 2N3904BU transistor is a versatile component that serves as a fundamental building block in electronic circuits, offering reliable performance in a wide range of applications.
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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de 2N3904BU en soluciones técnicas
What is the 2N3904BU transistor used for?
- The 2N3904BU is a general-purpose NPN bipolar junction transistor commonly used for amplification and switching applications in electronic circuits.
What are the typical operating conditions for the 2N3904BU?
- The 2N3904BU operates at a maximum collector current of 200mA, with a maximum collector-emitter voltage of 40V.
How do I identify the pinout of the 2N3904BU transistor?
- The pinout of the 2N3904BU is typically Emitter (E), Base (B), and Collector (C).
Can the 2N3904BU be used for audio amplifier circuits?
- Yes, the 2N3904BU is commonly used in low-power audio amplifier circuits due to its high gain and low noise characteristics.
What are the typical gain characteristics of the 2N3904BU?
- The DC current gain (hFE) of the 2N3904BU typically ranges from 100 to 300 under standard operating conditions.
Is the 2N3904BU suitable for low-frequency switching applications?
- Yes, the 2N3904BU can be used for low-frequency switching applications such as relay drivers and LED drivers.
What are the thermal considerations when using the 2N3904BU in a circuit?
- It is important to consider the power dissipation and thermal resistance of the 2N3904BU to ensure proper heat management in the circuit design.
Can the 2N3904BU be used in high-temperature environments?
- The 2N3904BU has a maximum junction temperature of 150°C, making it suitable for use in moderate temperature environments.
Are there any common failure modes associated with the 2N3904BU?
- Common failure modes include thermal runaway due to excessive current or inadequate heat sinking, as well as breakdown under excessive voltage.
Where can I find detailed specifications and application notes for the 2N3904BU?
- Detailed specifications and application notes for the 2N3904BU can be found in the datasheet provided by the manufacturer or distributor, as well as in technical reference manuals for transistor applications.