2N4871 Transistor Pinout, Equivalent, Datasheet and Uses
Update Time: Jul 12, 2023 Readership: 2994
Contents
The 2N4871 transistor is a versatile electronic component widely used in various applications due to its reliable performance and compact design. This article provides a comprehensive guide to understanding the 2N4871 transistor, covering essential aspects such as its pinout configuration, equivalent alternatives, datasheet specifications, and practical applications. This guide will equip you with valuable knowledge to leverage the capabilities of the 2N4871 transistor effectively. So let's delve into the details and unlock the potential of this essential electronic component.
What is a 2N4871 Transistor?
The 2N4871 transistor is a specific type of electronic component that falls under the category of bipolar junction transistors (BJTs). It is specifically classified as a PNP transistor. The 2N4871 is designed to handle low-power switching applications, making it suitable for a variety of electronic circuits.
This transistor consists of three layers of semiconductor material, namely the emitter, base, and collector. By applying a small current at the base terminal, the 2N4871 can control the flow of current between the collector and emitter terminals. This ability to amplify and switch electrical signals makes it a crucial component in many electronic devices and systems.
2N4871 Transistor Specs
Here are the specifications for the 2N4871 transistor:
1. Transistor Type: PNP
2. Maximum Collector-Emitter Voltage (VCEO): 40V
3. Maximum Collector-Base Voltage (VCBO): 60V
4. Maximum Emitter-Base Voltage (VEBO): 5V
5. Collector Current Continuous (IC): 0.5A
6. Power Dissipation (Pd): 625mW
7. DC Current Gain (hFE): 100 (minimum) - 300 (typical)
8. Transition Frequency (fT): 60MHz (typical)
9. Base-Emitter Saturation Voltage (VBE(sat)): 1.0V (maximum) at IC = 500mA
10. Collector-Emitter Saturation Voltage (VCE(sat)): 0.3V (maximum) at IC = 500mA
These specifications outline the key electrical characteristics and performance parameters of the 2N4871 transistor. It is essential to refer to the manufacturer's datasheet for precise and detailed information as specifications may vary slightly between different manufacturers.
2N4871 Transistor Features
Here's a table describing the features of the 2N4871 transistor:
| Feature | Description |
| Transistor Type | PNP |
| Maximum VCEO | 40V |
| Maximum VCBO | 60V |
| Maximum VEBO | 5V |
| Collector Current (IC) | 0.5A |
| Power Dissipation (Pd) | 625mW |
| DC Current Gain (hFE) | Minimum: 100<br>Typical: 300 |
| Transition Frequency | Typical: 60MHz |
| Base-Emitter Saturation Voltage (VBE(sat)) | Maximum: 1.0V (at IC = 500mA) |
| Collector-Emitter Saturation Voltage (VCE(sat)) | Maximum: 0.3V (at IC = 500mA) |
2N4871 Transistor Pinout
The 2N4871 transistor has three pins: the Base (B), Emitter (E), and Collector (C). The emitter pin is typically identified by a larger physical size or a tab for easy identification.
When looking at the flat side of the transistor with the pins facing towards you, the pinout is as follows:
Pin 1: Base (B)
Pin 2: Emitter (E)
Pin 3: Collector (C)
It's important to correctly identify and connect the pins of the transistor in accordance with the circuit or datasheet specifications to ensure proper functionality and performance.
2N4871 Transistor Equivalent Parts
2N3906: This is a widely available PNP transistor with a maximum voltage rating of 40V and a collector current of 200mA. It has a similar pinout configuration and can be used as a substitute for low-power switching applications.
BC557: The BC557 is a PNP transistor commonly used for general-purpose amplification and switching. It has a maximum voltage rating of 45V and a collector current of 100mA. The pinout configuration of the BC557 is different, so attention should be given to the pin connections.
MPSA42: The MPSA42 is another PNP transistor suitable for low-power applications. It has a maximum voltage rating of 300V and a collector current of 500mA. While its electrical characteristics differ slightly, it can serve as a replacement in certain scenarios.
2N4871 Transistor Uses
The 2N4871 transistor finds applications in various electronic circuits where low-power switching and amplification are required. Here are three common uses of the 2N4871 transistor:
Switching Circuits: The 2N4871 transistor is frequently employed in digital and analog switching circuits. It can control the flow of current through a load by acting as a switch, allowing or blocking the passage of electrical signals. Its ability to handle moderate currents and voltages makes it suitable for applications such as relay drivers, motor control circuits, and logic-level conversions.
Amplification: The 2N4871 transistor is also utilized in amplification circuits, particularly for low-power audio and signal amplification. By appropriately biasing the transistor, it can amplify weak input signals to higher levels, enabling them to drive speakers, headphones, or other audio output devices. Additionally, the 2N4871 transistor can be used in pre-amplifier stages to enhance the strength of signals before they enter the main amplification circuitry.
Voltage Regulation: Another significant application of the 2N4871 transistor is in voltage regulation circuits. By employing the transistor in conjunction with other components, such as resistors and capacitors, it can help stabilize and regulate voltage levels within a circuit. This is particularly useful in power supply designs, where the 2N4871 transistor can assist in maintaining a consistent output voltage despite variations in input voltage or load conditions.
2N4871 Transistor Datasheet
The 2N4871 Transistor datasheet provides comprehensive technical information on this PNP transistor, including pin configuration, electrical characteristics, and performance specifications. This valuable resource can help you understand and utilize the 2N4871 effectively.
Click to view the form:
Conclusion
In conclusion, the article delved into the key aspects of the 2N4871 transistor, covering its pinout configuration, equivalent alternatives, datasheet specifications, and practical applications. Understanding the pinout enables proper integration into circuits, while knowledge of equivalent parts provides flexibility in component selection. The datasheet serves as a vital resource, offering detailed technical information for efficient utilization. Lastly, the transistor's uses in switching, amplification, and voltage regulation highlight its versatility in various electronic applications. Armed with this knowledge, readers can confidently harness the capabilities of the 2N4871 transistor in their projects and designs.
Extended Reading
FAQ
-
What is the recommended storage temperature for the 2N4871 transistor?
The recommended storage temperature for the 2N4871 transistor is typically between -65°C to +150°C. Storing the transistor within this temperature range helps ensure its longevity and preserves its electrical characteristics.
-
What is the typical DC current gain (hFE) of the 2N4871 transistor?
The 2N4871 transistor typically has a DC current gain (hFE) ranging from 100 to 300. This parameter indicates the transistor's ability to amplify current and is an important consideration in various circuit designs.
-
What is the maximum power dissipation of the 2N4871 transistor?
The 2N4871 transistor has a maximum power dissipation (Pd) of 625mW, which indicates the maximum amount of power it can safely handle without exceeding its temperature limits.
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