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MMBT3904-HF
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MMBT3904-HF

Product Overview

Category

The MMBT3904-HF belongs to the category of small signal NPN transistors.

Use

It is commonly used for amplification and switching applications in electronic circuits.

Characteristics

  • Small size
  • High current gain
  • Low voltage drop

Package

The MMBT3904-HF is typically available in a SOT-23 package.

Essence

This transistor is essential for low-power, high-frequency applications.

Packaging/Quantity

It is usually packaged in reels with quantities varying based on manufacturer specifications.

Specifications

  • Maximum Collector-Base Voltage: 60V
  • Maximum Collector Current: 200mA
  • Power Dissipation: 350mW
  • Transition Frequency: 250MHz
  • Operating Temperature Range: -55°C to 150°C

Detailed Pin Configuration

The MMBT3904-HF has three pins: 1. Emitter (E) 2. Base (B) 3. Collector (C)

Functional Features

  • High current gain
  • Fast switching speed
  • Low noise

Advantages

  • Small form factor
  • Suitable for high-frequency applications
  • Low cost

Disadvantages

  • Limited power handling capability
  • Susceptible to thermal runaway at high currents

Working Principles

The MMBT3904-HF operates as a bipolar junction transistor, where the flow of current between the collector and emitter is controlled by the current flowing into the base terminal.

Detailed Application Field Plans

The MMBT3904-HF is widely used in the following applications: - Audio amplifiers - Signal amplification in sensor circuits - Oscillator circuits - Switching circuits

Detailed and Complete Alternative Models

Some alternative models to the MMBT3904-HF include: - 2N3904 - BC547 - PN2222A - 2SC945

In conclusion, the MMBT3904-HF is a versatile small signal NPN transistor that finds extensive use in various electronic applications due to its compact size, high current gain, and fast switching speed.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van MMBT3904-HF in technische oplossingen

  1. What is the MMBT3904-HF transistor used for?

    • The MMBT3904-HF 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 MMBT3904-HF transistor?

    • The MMBT3904-HF 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 MMBT3904-HF transistor as an amplifier?

    • The MMBT3904-HF can be used as a common-emitter amplifier by biasing the base with a suitable DC voltage and connecting the input signal to the base terminal. The amplified output signal is then taken from the collector terminal.

  4. Can the MMBT3904-HF transistor be used for switching applications?

    • Yes, the MMBT3904-HF transistor can be used for low-power switching applications such as turning on/off LEDs, relays, or small motors.

  5. What are the typical operating conditions for the MMBT3904-HF transistor?

    • The MMBT3904-HF transistor is typically operated within a temperature range of -55°C to 150°C and is suitable for low to moderate frequency applications.

  6. How do I calculate the biasing resistors for the MMBT3904-HF transistor in an amplifier circuit?

    • The biasing resistors can be calculated using the desired quiescent collector current (Ic), the supply voltage, and the transistor's base-emitter voltage drop.

  7. What are the common alternatives to the MMBT3904-HF transistor?

    • Common alternatives to the MMBT3904-HF include 2N2222, BC547, and BC548 transistors, which have similar characteristics and can be used in similar applications.

  8. Can the MMBT3904-HF transistor be used in high-frequency applications?

    • While the MMBT3904-HF is not specifically designed for high-frequency applications, it can still be used in low to moderate frequency circuits with appropriate design considerations.

  9. Are there any specific layout considerations when using the MMBT3904-HF transistor in a PCB design?

    • It is important to minimize lead lengths, provide adequate heat sinking if necessary, and ensure proper grounding and decoupling for stable operation.

  10. Where can I find detailed application notes and reference designs for the MMBT3904-HF transistor?

    • Detailed application notes and reference designs for the MMBT3904-HF transistor can be found in the manufacturer's datasheet, application guides, and online technical resources.