MMBT3904K Transistor
Introduction
The MMBT3904K is a type of NPN bipolar junction transistor (BJT) that belongs to the category of small signal transistors. It is commonly used in electronic circuits for amplification and switching purposes due to its high frequency and low power characteristics.
Basic Information Overview
- Category: Small signal transistor
- Use: Amplification and switching in electronic circuits
- Characteristics: High frequency, low power
- Package: SOT-23
- Essence: NPN BJT
- Packaging/Quantity: Typically available in reels of 3000 units
Specifications
- Maximum Power Dissipation: 350mW
- Collector-Base Voltage (VCBO): 60V
- Collector-Emitter Voltage (VCEO): 40V
- Emitter-Base Voltage (VEBO): 6V
- Collector Current (IC): 200mA
- DC Current Gain (hFE): 100 - 300
- Transition Frequency (fT): 250MHz
Detailed Pin Configuration
The MMBT3904K transistor has three pins: 1. Emitter (E) 2. Base (B) 3. Collector (C)
Functional Features
- High frequency capability
- Low power consumption
- Suitable for small signal amplification
- Fast switching speed
Advantages and Disadvantages
Advantages: - High frequency performance - Compact SOT-23 package - Wide range of hFE values
Disadvantages: - Limited maximum power dissipation - Relatively low collector current rating
Working Principles
The MMBT3904K operates based on the principles of bipolar junction transistors. When a small current flows into the base terminal, it controls a larger current flow between the collector and emitter terminals. This property allows the transistor to amplify small signals or act as a switch in electronic circuits.
Detailed Application Field Plans
The MMBT3904K transistor finds extensive use in various applications, including: - Audio amplifiers - Signal processing circuits - Oscillators - Switching circuits - RF amplifiers
Detailed and Complete Alternative Models
Some alternative models to the MMBT3904K include: - 2N3904 - BC547 - PN2222A - 2SC945
In conclusion, the MMBT3904K transistor is a versatile component widely used in electronic circuits for its high frequency capabilities and suitability for small signal amplification and switching.
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What is the MMBT3904K transistor used for?
- The MMBT3904K is a general-purpose NPN bipolar junction transistor commonly used for amplification and switching applications in electronic circuits.
What are the key specifications of the MMBT3904K transistor?
- The MMBT3904K transistor typically has a maximum collector current (Ic) of 200mA, a maximum collector-base voltage (Vcb) of 40V, and a maximum power dissipation (Pd) of 350mW.
How can I use the MMBT3904K transistor as a switch?
- The MMBT3904K can be used as a switch by biasing it into either cutoff or saturation regions. When biased into cutoff, it acts as an open switch, and when biased into saturation, it acts as a closed switch.
What are some common amplifier configurations using the MMBT3904K transistor?
- Common amplifier configurations include common emitter, common base, and common collector configurations, each offering different voltage and current gain characteristics.
Can the MMBT3904K be used in audio amplifier circuits?
- Yes, the MMBT3904K can be used in low-power audio amplifier circuits due to its moderate current and voltage capabilities.
What are the typical applications of the MMBT3904K in technical solutions?
- The MMBT3904K is commonly used in signal amplification, voltage regulation, oscillator circuits, and digital logic gates.
How do I determine the appropriate biasing for the MMBT3904K in my circuit?
- The appropriate biasing for the MMBT3904K depends on the specific application and desired operating point, and can be determined using transistor biasing calculations and simulations.
What are the temperature considerations for the MMBT3904K in technical solutions?
- The MMBT3904K's performance can be affected by temperature, so thermal management and derating should be considered to ensure reliable operation in varying environmental conditions.
Are there any common pitfalls to avoid when using the MMBT3904K in technical solutions?
- Common pitfalls include exceeding the maximum ratings, improper biasing, inadequate heat sinking, and insufficient consideration of parasitic effects in high-frequency applications.
Where can I find detailed information about using the MMBT3904K in technical solutions?
- Detailed information can be found in the datasheet provided by the manufacturer, as well as in application notes and reference designs from semiconductor component suppliers and industry resources.