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2N3904PH
Product Overview
- Category: Bipolar Transistor
- Use: Amplification and Switching
- Characteristics: Small signal NPN transistor, low power, high voltage, and current
- Package: TO-92
- Essence: General-purpose amplifier and switching applications
- Packaging/Quantity: Bulk packaging, typically available in reels of 2000 units
Specifications
- Maximum Power Dissipation: 625mW
- Maximum Collector-Emitter Voltage: 40V
- Maximum Collector Current: 200mA
- DC Current Gain (hFE): 100 - 300
- Transition Frequency (fT): 300MHz
Detailed Pin Configuration
- Emitter (E)
- Base (B)
- Collector (C)
Functional Features
- High current gain
- Low noise
- Fast switching speed
- Wide operating frequency range
Advantages and Disadvantages
- Advantages:
- Versatile and widely used
- Low cost
- Reliable performance
- Disadvantages:
- Limited power handling capability
- Sensitive to temperature variations
Working Principles
The 2N3904PH operates as a current-controlled switch or amplifier. In amplification applications, a small input current at the base terminal controls a larger current flow between the collector and emitter terminals. In switching applications, the transistor can be turned on or off by controlling the base current.
Detailed Application Field Plans
- Amplification: Used in audio amplifiers, signal processing circuits, and sensor interfaces.
- Switching: Employed in digital logic circuits, relay drivers, and motor control circuits.
Detailed and Complete Alternative Models
- 2N2222: Similar characteristics, interchangeable in many applications
- BC547: Comparable specifications, commonly used in low-power amplification
This comprehensive entry provides an in-depth understanding of the 2N3904PH transistor, covering its basic information, specifications, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.
技術ソリューションにおける 2N3904PH の適用に関連する 10 件の一般的な質問と回答をリストします。
What is the 2N3904PH transistor used for?
- The 2N3904PH 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 2N3904PH?
- The 2N3904PH typically operates at a maximum collector current of 200mA, with a maximum collector-emitter voltage of 40V.
Can the 2N3904PH be used for audio amplification?
- Yes, the 2N3904PH can be used for small-signal audio amplification due to its low noise and high gain characteristics.
What are some common circuit configurations using the 2N3904PH?
- Common circuit configurations include common emitter, common base, and common collector configurations for various amplification and switching purposes.
What are the key parameters to consider when designing with the 2N3904PH?
- Key parameters include the maximum collector current, maximum power dissipation, gain bandwidth product, and transition frequency.
Is the 2N3904PH suitable for low-power applications?
- Yes, the 2N3904PH is suitable for low-power applications due to its low saturation voltage and low leakage current.
Can the 2N3904PH be used in high-frequency applications?
- While the 2N3904PH has limitations at very high frequencies, it can still be used in moderate frequency applications such as audio amplification and signal processing.
What are some common alternatives to the 2N3904PH?
- Common alternatives include the 2N2222, BC547, and BC548 transistors, which have similar characteristics and can be used in similar applications.
Are there any specific thermal considerations when using the 2N3904PH?
- It's important to consider the thermal resistance and maximum junction temperature to ensure proper heat dissipation in the application.
Where can I find detailed datasheets and application notes for the 2N3904PH?
- Detailed datasheets and application notes for the 2N3904PH can be found on semiconductor manufacturer websites or distributor platforms.