Diodes Incorporated
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MMBT3904-7
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MMBT3904-7

Product Overview

Category: Transistor
Use: Amplification and switching in electronic circuits
Characteristics: Small signal NPN transistor, high voltage and current capability
Package: SOT-23
Essence: Miniature surface-mount transistor
Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

  • Collector-Base Voltage (VCBO): 40V
  • Collector-Emitter Voltage (VCEO): 40V
  • Emitter-Base Voltage (VEBO): 6V
  • Collector Current (IC): 200mA
  • Power Dissipation (PD): 350mW
  • Transition Frequency (fT): 250MHz
  • Operating Temperature Range: -55°C to 150°C

Detailed Pin Configuration

  1. Emitter (E)
  2. Base (B)
  3. Collector (C)

Functional Features

  • High voltage and current capability
  • Low saturation voltage
  • Fast switching speed
  • Small package size

Advantages and Disadvantages

Advantages: - High voltage and current ratings - Small package size - Wide operating temperature range

Disadvantages: - Limited power dissipation capability - Relatively low transition frequency

Working Principles

The MMBT3904-7 is a small signal NPN transistor that operates by controlling the flow of current between its collector and emitter terminals using a small current at its base terminal. It amplifies or switches electronic signals based on this principle.

Detailed Application Field Plans

  1. Amplification: Used in audio amplifiers, signal amplification circuits
  2. Switching: Employed in digital logic circuits, relay drivers
  3. Oscillation: Utilized in oscillators, signal generators

Detailed and Complete Alternative Models

  1. MMBT2222A: Similar small signal NPN transistor with lower voltage and current ratings
  2. MMBT4401: Comparable small signal PNP transistor with similar characteristics

This completes the entry for MMBT3904-7, covering its product details, specifications, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

تکنیکی حل میں MMBT3904-7 کے اطلاق سے متعلق 10 عام سوالات اور جوابات کی فہرست بنائیں

  1. What is the MMBT3904-7 transistor used for?

    • The MMBT3904-7 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 MMBT3904-7 transistor?

    • The MMBT3904-7 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 MMBT3904-7 in an amplifier circuit?

    • The MMBT3904-7 can be used as a small-signal amplifier in audio or other low-power applications by biasing it properly and connecting it in a common-emitter configuration.

  4. Can the MMBT3904-7 be used for switching applications?

    • Yes, the MMBT3904-7 can be used to switch moderate loads on and off in digital or analog circuits when biased appropriately and connected in a common-emitter or common-collector configuration.

  5. What are some typical applications of the MMBT3904-7 in technical solutions?

    • The MMBT3904-7 is commonly used in audio amplifiers, signal processing circuits, voltage regulators, and various sensor interfaces.

  6. What are the temperature considerations for using the MMBT3904-7 in technical solutions?

    • The MMBT3904-7 has a maximum operating temperature of 150°C, so it's important to consider heat dissipation and thermal management in high-temperature environments.

  7. How do I select appropriate biasing resistors for the MMBT3904-7?

    • The selection of biasing resistors depends on the specific application and desired operating point. Calculations based on the transistor's characteristics and the circuit requirements are typically used to determine suitable resistor values.

  8. Are there any alternative transistors that can be used in place of the MMBT3904-7?

    • Yes, similar transistors like 2N3904 or BC547 can often be used as substitutes for the MMBT3904-7, but it's important to check their specifications and pin configurations before substitution.

  9. What are the typical input and output capacitances of the MMBT3904-7?

    • The MMBT3904-7 has a typical input capacitance (Cib) of 8pF and a typical output capacitance (Cob) of 4pF, which should be considered in high-frequency applications.

  10. How can I ensure proper handling and ESD protection for the MMBT3904-7 during assembly and installation?

    • Proper ESD precautions, such as using grounded wrist straps and anti-static packaging, should be followed to prevent damage to the MMBT3904-7 during handling, assembly, and installation processes.