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MMBT3904K
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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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Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi MMBT3904K dalam penyelesaian teknikal

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. 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.