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2N4938

2N4938 Transistor

Product Overview

Category

The 2N4938 is a bipolar junction NPN transistor.

Use

It is commonly used for amplification and switching of electronic signals in various applications.

Characteristics

  • Low power dissipation
  • High current gain
  • Medium voltage capability

Package

The 2N4938 is typically available in a TO-92 package.

Essence

This transistor is essential for electronic circuit design, particularly in low-power applications.

Packaging/Quantity

The 2N4938 is usually sold in reels or tubes containing multiple units.

Specifications

  • Maximum Collector-Emitter Voltage: 40V
  • Maximum Collector-Base Voltage: 60V
  • Maximum Emitter-Base Voltage: 6V
  • Collector Current - Continuous: 0.5A
  • Power Dissipation: 625mW
  • Transition Frequency: 100MHz

Detailed Pin Configuration

The 2N4938 transistor has three pins: 1. Emitter (E) 2. Base (B) 3. Collector (C)

Functional Features

The 2N4938 transistor offers the following functional features: - High current gain - Low power dissipation - Fast switching speed

Advantages

  • Small form factor
  • Suitable for low-power applications
  • Cost-effective

Disadvantages

  • Limited voltage and current handling capabilities
  • Not suitable for high-power applications

Working Principles

The 2N4938 operates based on the principles of bipolar junction transistors, where the flow of current is controlled by the application of a small input signal.

Detailed Application Field Plans

The 2N4938 transistor finds applications in various fields including: - Audio amplification circuits - Signal amplification in sensor interfaces - Switching circuits in low-power electronic devices

Detailed and Complete Alternative Models

Some alternative models to the 2N4938 include: - 2N2222 - BC547 - 2N3904 - PN2222

In conclusion, the 2N4938 transistor is a versatile component widely used in low-power electronic applications due to its compact size, cost-effectiveness, and reliable performance.

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技術ソリューションにおける 2N4938 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。

  1. What is the 2N4938 transistor used for?

    • The 2N4938 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 2N4938 transistor?

    • The 2N4938 transistor typically has a maximum collector current of 0.5A, a maximum collector-base voltage of 40V, and a maximum power dissipation of 625mW.

  3. How do I identify the pinout of the 2N4938 transistor?

    • The pinout of the 2N4938 transistor is typically identified as the emitter (E), base (B), and collector (C) pins. When viewing the flat side of the transistor with the pins down, the leftmost pin is the emitter, the middle pin is the base, and the rightmost pin is the collector.

  4. Can the 2N4938 be used for audio amplifier applications?

    • Yes, the 2N4938 can be used in small signal audio amplifier circuits due to its low noise and high gain characteristics.

  5. What are some common circuit configurations using the 2N4938 transistor?

    • The 2N4938 can be used in common emitter, common base, and common collector configurations for various amplification and switching purposes.

  6. What are the typical operating conditions for the 2N4938 transistor?

    • The 2N4938 transistor is typically operated within a temperature range of -65°C to 200°C and is suitable for use in a wide range of electronic devices.

  7. Are there any specific considerations for driving inductive loads with the 2N4938 transistor?

    • When driving inductive loads, such as relays or motors, it's important to include a flyback diode across the load to protect the transistor from voltage spikes generated by the inductive load.

  8. Can the 2N4938 be used in high-frequency applications?

    • While the 2N4938 can be used in moderate frequency applications, it may not be suitable for very high-frequency applications due to its transition frequency and capacitance characteristics.

  9. What are some common alternatives to the 2N4938 transistor?

    • Common alternatives to the 2N4938 include the 2N2222, BC547, and 2N3904 transistors, which have similar characteristics and can be used in comparable applications.

  10. Where can I find detailed datasheets and application notes for the 2N4938 transistor?

    • Detailed datasheets and application notes for the 2N4938 transistor can be found on semiconductor manufacturer websites, electronics component distributors, and technical documentation repositories.