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2N4919 Transistor
Product Overview
The 2N4919 is a bipolar junction transistor (BJT) belonging to the category of small-signal transistors. It is commonly used for amplification and switching applications due to its high frequency and low power characteristics. The transistor is typically packaged in a TO-92 package and is available in various quantities.
Basic Information
- Category: Small-signal transistor
- Use: Amplification and switching
- Characteristics: High frequency, low power
- Package: TO-92
- Packaging/Quantity: Various quantities available
Specifications
The 2N4919 transistor has the following specifications: - Maximum Collector-Base Voltage: 40V - Maximum Collector Current: 200mA - DC Current Gain (hFE): 100 - 300 - Transition Frequency: 250MHz
Detailed Pin Configuration
The 2N4919 transistor has three pins: 1. Emitter (E) 2. Base (B) 3. Collector (C)
Functional Features
The 2N4919 transistor offers the following functional features: - High frequency operation - Low power consumption - Suitable for small-signal amplification
Advantages and Disadvantages
Advantages
- High frequency capability
- Low power consumption
- Compact TO-92 package
Disadvantages
- Limited maximum collector current
- Moderate DC current gain range
Working Principles
The 2N4919 operates based on the principles of bipolar junction transistors, utilizing the flow of charge carriers to amplify or switch electronic signals.
Detailed Application Field Plans
The 2N4919 transistor finds extensive use in the following application fields: - Audio amplification circuits - Radio frequency (RF) amplifiers - Oscillator circuits
Detailed and Complete Alternative Models
Some alternative models to the 2N4919 transistor include: - 2N2222 - BC547 - 2N3904
In conclusion, the 2N4919 transistor is a versatile small-signal transistor with high frequency capabilities, making it suitable for a wide range of amplification and switching applications.
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What is 2N4919?
- 2N4919 is a silicon NPN transistor commonly used for general-purpose amplification and switching applications.
What are the typical applications of 2N4919?
- 2N4919 is often used in audio amplifiers, signal processing circuits, and low-power switching applications.
What are the key electrical characteristics of 2N4919?
- The key electrical characteristics include a maximum collector current of 100mA, a maximum collector-emitter voltage of 40V, and a maximum power dissipation of 625mW.
How do I identify the pinout of 2N4919?
- The pinout of 2N4919 is typically identified as the emitter (E), base (B), and collector (C) pins.
What are some common alternatives to 2N4919?
- Common alternatives to 2N4919 include 2N2222, BC547, and BC548 transistors, which have similar characteristics and can be used in its place.
Can 2N4919 be used for high-frequency applications?
- No, 2N4919 is not suitable for high-frequency applications due to its limited frequency response.
What are the recommended operating conditions for 2N4919?
- It is recommended to operate 2N4919 within a temperature range of -55°C to 150°C and with a maximum collector current of 100mA.
How do I calculate the biasing resistors for 2N4919 in an amplifier circuit?
- The biasing resistors can be calculated using the standard transistor biasing equations based on the desired operating point and the transistor's characteristics.
Can 2N4919 be used in a Darlington pair configuration?
- Yes, 2N4919 can be used in a Darlington pair configuration to achieve higher current gain and lower saturation voltage.
Where can I find the detailed datasheet for 2N4919?
- The detailed datasheet for 2N4919 can be found on various semiconductor manufacturer websites or electronic component distributor platforms.