
2N4400BU Discrete Semiconductor Products |
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Allicdata Part #: | 2N4400-ND |
Manufacturer Part#: |
2N4400BU |
Price: | $ 0.00 |
Product Category: | Discrete Semiconductor Products |
Manufacturer: | ON Semiconductor |
Short Description: | TRANS NPN 40V 0.6A TO-92 |
More Detail: | Bipolar (BJT) Transistor NPN 40V 600mA 625mW Thro... |
DataSheet: | ![]() |
Quantity: | 1000 |
1 +: | 0.00000 |
Series: | -- |
Packaging: | Bulk |
Part Status: | Obsolete |
Transistor Type: | NPN |
Current - Collector (Ic) (Max): | 600mA |
Voltage - Collector Emitter Breakdown (Max): | 40V |
Vce Saturation (Max) @ Ib, Ic: | 750mV @ 50mA, 500mA |
Current - Collector Cutoff (Max): | -- |
DC Current Gain (hFE) (Min) @ Ic, Vce: | 50 @ 150mA, 1V |
Power - Max: | 625mW |
Frequency - Transition: | -- |
Operating Temperature: | -55°C ~ 150°C (TJ) |
Mounting Type: | Through Hole |
Package / Case: | TO-226-3, TO-92-3 (TO-226AA) |
Supplier Device Package: | TO-92-3 |
Base Part Number: | 2N4400 |
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Bipolar junction transistors, commonly referred to as BJTs, are three-terminal devices composed of two pn junctions. They are used in a multitude of applications including amplifier circuits and switches. The 2N4400BU is a popular BJT employed due to its high current and voltage ratings. In this article, we will introduce the relevant application fields and discuss its working principle.
2N4400BU Application Fields
The 2N4400BU BJT can be used in various application fields. As a general-purpose transistor, it is useful for a wide range of projects, especially power amplification and switching. It is well-suited for general-purpose amplifiers, drivers, and low-frequency AC and DC switching. Additionally, this component is often used as a relay driver and also as a voltage regulator. In its addition, it is integrated in high-frequency circuits, such as radio and TV, as well as in other devices like TVs and computers.
Other application fields for the 2N4400BU include motor control circuits, DC-DC conversion, fan control, and line drive application. This component is also employed as a low-frequency amplifier. Furthermore, this BJT is used as a switching transistor for DC current control.
Working Principle
The basic principle of a BJT is that of two PN junctions forming a single circuit element with three terminals. The three terminals are referred to as the emitter, base, and collector. The current flows from the emitter to the collector when the base current is increased. This process forms a voltage divider between the base and collector resulting in a much higher current gain. As the current gain increase, the output between the collector and emitter increases as well.
The 2N4400BU BJT is an NPN-type device, meaning that the emitter has a negative charge and the collector has a positive charge. This difference in charge creates an electric field between the two terminals. When the base current is increased, the electric field separating the two terminals is strengthened, causing the current to increase accordingly. The current gain between the collector and emitter is known as the transistor\'s beta.
In addition to its normal use as an amplifier, the 2N4400BU BJT may also be used as a switch. This is accomplished by decreasing the base current when the switch is on, thus reversing the electric field and allowing the current to flow between the collector and emitter. When the switch is off, the base current is increased, creating a strong electric field which prevents the flow of current.
The 2N4400BU provides an excellent solution for current and voltage control in equipment such as audio amplifiers, DC motor controllers, and voltage regulators. Its wide range of applicability, coupled with its robustness, makes it one of the most commonly used bipolar junction transistors. It is easy to understand how the basic principles of this component function, and its versatility makes it a mainstay for modern electronic circuits.
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