2N3904 Transistor: Difference between revisions
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Created page with "== 2N3904 Transistor == The '''2N3904''' is a widely used NPN bipolar junction transistor (BJT). It is designed for low-power, general-purpose applications, making it suitable for switching and amplifying circuits. This transistor is particularly popular due to its affordability, availability, and reliability in various electronic projects. === General Information === * **Type:** NPN Bipolar Junction Transistor * **Application:** General-purpose, switching, and amplific..." |
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=== General Information === | === General Information === | ||
* | * '''Type:''' NPN Bipolar Junction Transistor | ||
* | * '''Application:''' General-purpose, switching, and amplification | ||
* | * '''Packaging:''' TO-92 | ||
=== Key Features === | === Key Features === | ||
| Line 35: | Line 35: | ||
=== Pin Configuration === | === Pin Configuration === | ||
The 2N3904 transistor has three pins, which are arranged as follows in the TO-92 package: | The 2N3904 transistor has three pins, which are arranged as follows in the TO-92 package: | ||
* | * '''Pin 1:''' Emitter | ||
* | * '''Pin 2:''' Base | ||
* | * '''Pin 3:''' Collector | ||
=== Applications === | === Applications === | ||
Revision as of 06:34, 27 December 2024
2N3904 Transistor
The 2N3904 is a widely used NPN bipolar junction transistor (BJT). It is designed for low-power, general-purpose applications, making it suitable for switching and amplifying circuits. This transistor is particularly popular due to its affordability, availability, and reliability in various electronic projects.
General Information
- Type: NPN Bipolar Junction Transistor
- Application: General-purpose, switching, and amplification
- Packaging: TO-92
Key Features
- Low power consumption
- High-speed switching capability
- Compact size
- Wide range of applications in analog and digital circuits
Specifications
| Parameter | Symbol | Value |
|---|---|---|
| Maximum Collector-Emitter Voltage | VCEO | 40 V |
| Maximum Collector-Base Voltage | VCBO | 60 V |
| Maximum Emitter-Base Voltage | VEBO | 6 V |
| Maximum Collector Current | IC | 200 mA |
| Power Dissipation | Ptot | 625 mW |
| Transition Frequency | fT | 300 MHz |
| DC Current Gain (hFE) | hFE | 100–300 |
Pin Configuration
The 2N3904 transistor has three pins, which are arranged as follows in the TO-92 package:
- Pin 1: Emitter
- Pin 2: Base
- Pin 3: Collector
Applications
The 2N3904 is used in a variety of circuits and applications, including:
- Signal amplification
- Low-power switching
- Oscillator circuits
- LED drivers
- Analog circuits
- RF circuits
Circuit Example
Simple LED Driver Circuit A 2N3904 can be used to drive an LED:
- Connect the emitter to the ground.
- Connect the collector to one terminal of the LED with a suitable current-limiting resistor in series.
- Apply a small current to the base via a resistor to turn the LED on.
Advantages
- Low cost and widely available
- High speed for switching
- Adequate performance for most general-purpose applications
Limitations
- Limited to low-power applications
- Not suitable for high-current or high-voltage circuits
Common Alternatives
Other similar transistors include:
- 2N2222
- BC547
- BC548
