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2N4921G Transistor
Product Overview
Category:
The 2N4921G is a general-purpose NPN bipolar junction transistor (BJT).
Use:
It is commonly used for amplification and switching of electronic signals in various applications.
Characteristics:
- Low power dissipation
- High current gain
- Medium voltage capability
Package:
The 2N4921G is typically available in a TO-92 package.
Essence:
This transistor is essential for electronic circuit design, particularly in low-power applications.
Packaging/Quantity:
It is usually sold in reels or tubes containing multiple units, with quantities varying based on the supplier.
Specifications
- Collector-Base Voltage (VCBO): 40V
- Collector-Emitter Voltage (VCEO): 20V
- Emitter-Base Voltage (VEBO): 5V
- Collector Current (IC): 200mA
- Power Dissipation (PD): 625mW
- Transition Frequency (ft): 250MHz
- Operating Temperature Range: -55°C to 150°C
Detailed Pin Configuration
The 2N4921G transistor has three pins: 1. Collector (C) 2. Base (B) 3. Emitter (E)
Functional Features
- High current gain allows for small base current to control large collector current.
- Fast switching speed suitable for high-frequency applications.
- Low power dissipation makes it suitable for battery-operated devices.
Advantages
- Versatile and widely used in various electronic circuits.
- Small form factor and easy to integrate into circuit designs.
- Cost-effective solution for amplification and switching applications.
Disadvantages
- Limited voltage and current handling capabilities compared to power transistors.
- Sensitive to temperature variations, requiring proper thermal management in high-power applications.
Working Principles
The 2N4921G operates as a current-controlled switch or amplifier. When a small current flows into the base terminal, it controls a much larger current between the collector and emitter terminals, allowing it to amplify or switch electronic signals.
Detailed Application Field Plans
The 2N4921G is commonly used in the following applications: - Audio amplifiers - Signal amplification in sensor circuits - Switching applications in electronic control systems - Oscillator circuits
Detailed and Complete Alternative Models
Some alternative models to the 2N4921G include: - 2N2222A - BC547 - 2N3904 - PN2222A
In conclusion, the 2N4921G transistor is a versatile component with a wide range of applications in electronic circuit design. Its compact size, high current gain, and moderate voltage capability make it an essential building block for various electronic systems.
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Énumérez 10 questions et réponses courantes liées à l'application de 2N4921G dans les solutions techniques
What is the 2N4921G transistor used for?
- The 2N4921G is a general-purpose NPN bipolar junction transistor commonly used in amplification and switching applications.
What are the key specifications of the 2N4921G transistor?
- The 2N4921G has a maximum collector current of 500mA, a maximum collector-emitter voltage of 40V, and a maximum power dissipation of 625mW.
Can the 2N4921G be used for audio amplification?
- Yes, the 2N4921G can be used for small-signal audio amplification due to its moderate power handling capabilities and low noise characteristics.
Is the 2N4921G suitable for switching applications?
- Yes, the 2N4921G can be used for low-power switching applications such as driving relays or small motors.
What are the typical operating conditions for the 2N4921G?
- The 2N4921G operates well within a temperature range of -65°C to 200°C and is typically used in low to moderate frequency applications.
Does the 2N4921G require a heat sink for operation?
- For most common applications, the 2N4921G does not require a heat sink due to its moderate power dissipation capabilities.
Can the 2N4921G be used in high-frequency applications?
- While the 2N4921G can function at higher frequencies, it is more commonly used in low to moderate frequency applications due to its moderate transition frequency.
Are there any recommended alternative transistors to the 2N4921G?
- Some alternatives to the 2N4921G include the 2N2222A, BC547, and 2N3904, which have similar characteristics and can be used in its place for many applications.
What are the typical circuit configurations for using the 2N4921G?
- The 2N4921G is commonly used in common emitter and common collector configurations for amplification and switching purposes.
Where can I find detailed datasheets and application notes for the 2N4921G?
- Detailed datasheets and application notes for the 2N4921G can be found on semiconductor manufacturer websites, electronic component distributor websites, and technical forums dedicated to electronics and electrical engineering.