2N3906 Transistor: Difference between revisions
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== 2N3906 Transistor == | == 2N3906 Transistor == | ||
The '''2N3906''' is a popular PNP bipolar junction transistor (BJT) used for general-purpose low-power amplification and switching applications. It is commonly paired with the 2N3904 NPN transistor and is known for its reliability, affordability, and availability. | The '''2N3906''' is a popular PNP bipolar junction transistor (BJT) used for general-purpose low-power amplification and switching applications. It is commonly paired with the [[2N3904]] NPN transistor and is known for its reliability, affordability, and availability. | ||
=== General Information === | === General Information === | ||
| Line 8: | Line 8: | ||
=== Key Features === | === Key Features === | ||
* Complementary to the 2N3904 (NPN) | * Complementary to the [[2N3904]] (NPN) | ||
* Low saturation voltage | * Low saturation voltage | ||
* Fast switching speed | * Fast switching speed | ||
* Suitable for a wide range of analog and digital applications | * Suitable for a wide range of analog and digital applications | ||
=== Specifications using Cargo === | |||
{{ComponentBipolarTransistor | |||
|PartNumber=2N3906 | |||
|Polarity=PNP | |||
|Vceo=40 | |||
|Ic=200 | |||
|hFE=100 | |||
|fT=250 | |||
|Package=TO-92 | |||
|Datasheet=https://www.onsemi.com/download/data-sheet/pdf/2n3906-d.pdf | |||
}} | |||
=== Specifications === | === Specifications === | ||
| Line 46: | Line 58: | ||
* General-purpose switching | * General-purpose switching | ||
* Analog circuits | * Analog circuits | ||
* Complementary push-pull amplifier designs (with 2N3904) | * Complementary push-pull amplifier designs (with [[2N3904]]) | ||
* LED control circuits | * LED control circuits | ||
| Line 73: | Line 85: | ||
=== Complementary Pair === | === Complementary Pair === | ||
* The 2N3906 is the PNP complement of the NPN '''2N3904'''. | * The 2N3906 is the PNP complement of the NPN '''[[2N3904]]'''. | ||
=== 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=2n3906 2N3906 on Datasheet Archive] | ||
Latest revision as of 11:34, 7 February 2026
2N3906 Transistor
The 2N3906 is a popular PNP bipolar junction transistor (BJT) used for general-purpose low-power amplification and switching applications. It is commonly paired with the 2N3904 NPN transistor and is known for its reliability, affordability, and availability.
General Information
- Type: PNP Bipolar Junction Transistor
- Application: General-purpose, switching, and amplification
- Packaging: TO-92 (plastic)
Key Features
- Complementary to the 2N3904 (NPN)
- Low saturation voltage
- Fast switching speed
- Suitable for a wide range of analog and digital applications
Specifications using Cargo
| 2N3906 | |
|---|---|
| Polarity | PNP |
| VCEO (max) | 40 V |
| IC (max) | 200 mA |
| hFE (min) | 100 |
| fT (typ) | 250 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 | –40 V |
| Maximum Emitter-Base Voltage | VEBO | –5 V |
| Maximum Collector Current | IC | –200 mA |
| Power Dissipation | Ptot | 625 mW |
| Transition Frequency | fT | 250 MHz |
| DC Current Gain (hFE) | hFE | 100–300 |
Pin Configuration
The 2N3906 transistor has three pins in the TO-92 package:
- Pin 1: Emitter
- Pin 2: Base
- Pin 3: Collector
(Note: Viewed with flat side facing you.)
Applications
The 2N3906 is commonly used in:
- Low-power signal amplification
- General-purpose switching
- Analog circuits
- Complementary push-pull amplifier designs (with 2N3904)
- LED control circuits
Circuit Example
Basic PNP Switching Circuit A 2N3906 can be used to switch a load:
- Connect the emitter to the positive voltage supply.
- Connect the collector to one end of the load; the other end of the load goes to ground.
- A base resistor is connected between the base and ground (or a logic signal).
- When the base is pulled low (below the emitter potential by ~0.7 V), the transistor turns on.
Advantages
- Low cost and widely available
- Ideal for negative-side switching
- Fast switching response
- Useful in complementary pair configurations
Limitations
- Limited to low-current applications
- Not suitable for high-voltage or high-power loads
Common Alternatives
- PN2907 (higher current rating)
- BC558 (European equivalent)
- 2N2906
Complementary Pair
- The 2N3906 is the PNP complement of the NPN 2N3904.
