2N4939 Transistor

Product Overview

Category:

The 2N4939 is a general-purpose NPN bipolar junction transistor (BJT).

Use:

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

Characteristics:

Low power dissipation
High current gain
Medium frequency capability

Package:

The 2N4939 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 2N4939 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 2N4939 transistor has three pins: the collector (C), base (B), and emitter (E). The pinout configuration is as follows: - Collector (C) - Pin 1 - Base (B) - Pin 2 - Emitter (E) - Pin 3

Functional Features

The 2N4939 transistor offers the following functional features: - High current gain - Low noise - Fast switching speed

Advantages and Disadvantages

Advantages

Versatile application range
Low power dissipation
Reliable performance

Disadvantages

Limited maximum collector current
Moderate transition frequency

Working Principles

The 2N4939 operates based on the principles of bipolar junction transistors, where the flow of current is controlled by the voltage applied to the base terminal.

Detailed Application Field Plans

The 2N4939 transistor finds extensive use in the following applications: - Audio amplifiers - Signal amplification circuits - Switching circuits - Oscillator circuits

Detailed and Complete Alternative Models

Some alternative models to the 2N4939 include: - 2N2222 - BC547 - 2N3904 - 2N4401

In conclusion, the 2N4939 transistor is a versatile component with a wide range of applications in electronic circuit design. Its characteristics make it suitable for various low-power amplification and switching tasks.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací 2N4939 v technických řešeních

What is the 2N4939 transistor used for?
- The 2N4939 transistor is commonly used for general-purpose switching and amplification applications.
What are the key specifications of the 2N4939 transistor?
- The 2N4939 is an NPN silicon transistor with a maximum collector current of 0.5A, a maximum collector-emitter voltage of 40V, and a maximum power dissipation of 0.625W.
Can the 2N4939 be used for low-power amplification?
- Yes, the 2N4939 can be used for low-power amplification in audio and other low-frequency applications.
Is the 2N4939 suitable for use in switching circuits?
- Yes, the 2N4939 is suitable for use in switching circuits due to its moderate switching speed and current-handling capabilities.
What are the typical operating conditions for the 2N4939?
- The 2N4939 operates within a temperature range of -65°C to 200°C and is typically used in common emitter or common collector configurations.
Are there any recommended alternative transistors to the 2N4939?
- Some alternative transistors that can be used in place of the 2N4939 include the 2N4403, BC557, and 2N3906, depending on specific application requirements.
Can the 2N4939 be used in high-frequency applications?
- The 2N4939 is not typically recommended for high-frequency applications due to its limited frequency response and transition frequency.
What are the typical circuit configurations for the 2N4939?
- The 2N4939 is commonly used in common emitter, common collector, and emitter follower configurations in various technical solutions.
Does the 2N4939 require any special heat sinking or thermal considerations?
- For most general-purpose applications, the 2N4939 does not require special heat sinking or thermal considerations, but it's important to consider thermal management for high-power applications.
Where can I find detailed datasheets and application notes for the 2N4939?
- Detailed datasheets and application notes for the 2N4939 can be found on semiconductor manufacturer websites, electronic component distributors, and technical documentation repositories.