2N3904 Transistor: Difference between revisions
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* Compact size | * Compact size | ||
* Wide range of applications in analog and digital circuits | * Wide range of applications in analog and digital circuits | ||
=== Specifications using Cargo === | |||
{{ComponentBipolarTransistor | |||
|PartNumber=2N3904 | |||
|Polarity=NPN | |||
|Vceo=40 | |||
|Ic=200 | |||
|hFE=100 | |||
|fT=300 | |||
|Package=TO-92 | |||
|Datasheet=https://www.onsemi.com/download/data-sheet/pdf/2n3903-d.pdf | |||
}} | |||
=== Specifications === | === Specifications === | ||
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=== Common Alternatives === | === Common Alternatives === | ||
Other similar transistors include: | Other similar transistors include: | ||
* 2N2222 | * [[2N2222]] | ||
* BC547 | * BC547 | ||
* BC548 | * BC548 | ||
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=== Additional Resources === | === Additional Resources === | ||
* [https://en.wikipedia.org/wiki/Bipolar_junction_transistor Bipolar Junction Transistor - Wikipedia] | * [https://en.wikipedia.org/wiki/Bipolar_junction_transistor Bipolar Junction Transistor - Wikipedia] | ||
* [https:// | * [https://www.datasheetarchive.com/?q=2n3904 2N3904 on Datasheet Archive] | ||
Latest revision as of 00:29, 7 February 2026
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 using Cargo
| 2N3904 | |
|---|---|
| Polarity | NPN |
| VCEO (max) | 40 V |
| IC (max) | 200 mA |
| hFE (min) | 100 |
| fT (typ) | 300 MHz |
| Package | TO-92 |
| View Datasheet | |
Standard TO-92 Pinout (Bottom View)
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
