Introduction
The 2N3906 is a highly popular and versatile general-purpose PNP transistor widely used in low-power amplification and switching applications. As a fundamental component, it’s a favorite among electronics students and hobbyists due to its reliability and low cost. The transistor is designed to handle a continuous collector current (IC) of up to -200mA and has a collector-emitter voltage (VCEO) of -40V, making it suitable for a wide variety of small-scale electronic projects.
One of the key features of the 2N3906 is its high DC current gain (hFE), which typically ranges from 100 to 300. This high gain allows a very small base current to control a much larger collector current, making it an efficient choice for both amplification and switching. It’s commonly used as a signal amplifier in simple audio frequency (AF) circuits and as a low-power switch to control small loads like LEDs or relays. Its total power dissipation is 625 milliwatts, which is sufficient for most low-power applications.
2N3906 PNP Transistor
The transistor is housed in a standard TO-92 package, a compact and easy-to-use form factor for through-hole mounting. The widespread availability and dependable performance of the 2N3906 have solidified its position as a go-to component for prototyping and educational purposes. Its balance of power handling, current gain, and cost-effectiveness makes it a fundamental building block in the electronics world.
2N3906 Pinout
2N3906 PNP Transistor Key Features
The 2N3906 is a widely used general-purpose PNP transistor known for its reliability and versatility in low-power amplification and switching circuits. It is the complementary counterpart to the 2N3904 NPN transistor.
- Low Current Capability
- Low Voltage Rating
- High DC Current Gain
- Low Power Dissipation
- High Transition Frequency
- Compact Package
2N3906 Transistor Specifications/Characteristics
| Characterstics | Rating (Max) |
|---|---|
| Collector Current(IC): | 200mA |
| Collector-Emitter Voltage (VCE): | 40V |
| Collector-Base Voltage (VCB): | 40V |
| Emitter-Base Voltage (VEBO): | 5V |
| Collector Dissipation (Pc): | 625 mW |
| Transition Frequency (fT): | 250 MHz |
| DC Current Gain (hFE): | 100 – 300 |
| Storage & Operating temperature Should Be: | -55 to +150 °C |
More Circuit Layouts
Key Applications of 2N3906 PNP Transistor
The 2N3906 is a general-purpose PNP transistor widely used in low-power electronics. Its reliability and compact size make it a popular choice for both hobbyists and commercial applications.
Here are some of its key applications:
- Low-Power Switching: The 2N3906 is frequently used as a simple switch to control low-current loads (up to 200mA) in circuits. Common examples include turning on/off LEDs, small relays, or buzzers.
- Signal Amplification: Due to its high DC current gain, the 2N3906 is well-suited for amplifying small analog signals. It’s often found in audio pre-amplifiers and other low-level signal conditioning circuits.
- Complementary Pair in Push-Pull Circuits: It is the complementary transistor to the 2N3904 (NPN). Together, they can be used in Class B push-pull amplifiers, a common configuration for driving speakers and other low-power loads.
- Logic Inverter/Buffer: In digital electronics, the 2N3906 can act as a logic inverter, converting a high-level voltage signal to a low-level one, and vice versa. It also serves as a buffer to isolate stages or provide additional current to drive a circuit.
- Oscillators and Timers: The transistor’s consistent characteristics make it a reliable component in circuits like simple oscillators, multivibrators, and timer circuits.
NPN Complimentary Transistor
NPN Complementary of 2N3906 Transistor is 2N3904.
Equivalent Transistors of 2N3906
BC557, 2N2907, BC556, A1015, C945, 2N4403, 9014, BC527, BC558, BC559
(The pin configuration of the equivalent transistors may different from the 2N3906)
Datasheet of 2N3906 PNP Transistor
Click the following Button below to download the datasheet of 2N3906 PNP Transistor :
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