Microsemi Corporation
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2N4901

2N4901 Transistor

Product Overview

Category

The 2N4901 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 2N4901 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 2N4901 is usually packaged in reels or tubes, with quantities varying based on manufacturer specifications.

Specifications

  • Collector-Base Voltage (VCBO): 60V
  • Collector-Emitter Voltage (VCEO): 40V
  • Emitter-Base Voltage (VEBO): 6V
  • Collector Current (IC): 200mA
  • Power Dissipation (PD): 625mW
  • Transition Frequency (ft): 150MHz

Detailed Pin Configuration

The 2N4901 transistor has three pins: 1. Collector (C) 2. Base (B) 3. Emitter (E)

Functional Features

  • High current gain allows for small base current to control larger collector current.
  • Suitable for low-power applications due to its low power dissipation.

Advantages and Disadvantages

Advantages

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

Disadvantages

  • Limited maximum collector current compared to other transistors
  • Relatively low transition frequency

Working Principles

The 2N4901 operates as a current-controlled switch or amplifier. When a small current flows into the base, it controls a much larger current between the collector and emitter.

Detailed Application Field Plans

The 2N4901 is widely used in: - Audio amplifiers - Signal amplification circuits - Switching circuits

Detailed and Complete Alternative Models

Some alternative models to the 2N4901 include: - 2N2222 - BC547 - 2N3904

In conclusion, the 2N4901 transistor is a versatile component with applications in amplification and switching circuits, offering high current gain and low power dissipation. Its compact TO-92 package makes it suitable for various electronic designs.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací 2N4901 v technických řešeních

  1. What is 2N4901?

    • 2N4901 is a general-purpose PNP bipolar junction transistor (BJT) commonly used in electronic circuits for amplification and switching applications.

  2. What are the key specifications of 2N4901?

    • The key specifications of 2N4901 include a maximum collector current of 200mA, a maximum collector-emitter voltage of 40V, and a maximum power dissipation of 625mW.

  3. How can 2N4901 be used for amplification?

    • 2N4901 can be used as an amplifier by biasing it in the active region and applying an input signal to the base terminal. The amplified output signal is then obtained from the collector terminal.

  4. In what types of switching applications can 2N4901 be used?

    • 2N4901 can be used in low-power switching applications such as driving small relays, LEDs, or other low-current loads.

  5. What are the typical operating conditions for 2N4901?

    • The typical operating conditions for 2N4901 include a collector current of 100mA, a collector-emitter voltage of 10V, and a base current of 10mA.

  6. What are some common circuit configurations using 2N4901?

    • Common circuit configurations using 2N4901 include common emitter amplifiers, switch-mode power supplies, and logic level shifting circuits.

  7. Can 2N4901 be used in high-frequency applications?

    • While 2N4901 can be used in moderate frequency applications, it may not be suitable for high-frequency applications due to its transition frequency and capacitance characteristics.

  8. What are the typical thermal considerations when using 2N4901?

    • When using 2N4901, it's important to consider heat dissipation and thermal resistance to ensure that the device operates within its safe temperature limits.

  9. Are there any common alternatives to 2N4901?

    • Some common alternatives to 2N4901 include 2N3906, BC557, and BC327, which are also PNP transistors with similar characteristics.

  10. Where can I find detailed application notes for using 2N4901 in technical solutions?

    • Detailed application notes for using 2N4901 can be found in the datasheets provided by semiconductor manufacturers, as well as in electronics textbooks and application guides.