BU407

Series:	--
Packaging:	Bulk
Part Status:	Active
Transistor Type:	NPN
Current - Collector (Ic) (Max):	7A
Voltage - Collector Emitter Breakdown (Max):	150V
Vce Saturation (Max) @ Ib, Ic:	1V @ 500mA, 5A
Current - Collector Cutoff (Max):	100nA
DC Current Gain (hFE) (Min) @ Ic, Vce:	--
Power - Max:	60W
Frequency - Transition:	10MHz
Operating Temperature:	-65°C ~ 150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-220-3
Supplier Device Package:	TO-220-3

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BU407 Application Field and Working Principle
The BU407 is a single bipolar (BJT) transistor manufactured by NXP Semiconductors. Its characteristics make it suitable for many applications, including analog amplification, logic circuits, switching, audio amplification and power switching. In this article, the field of application, characteristics and the working principle of the BU407 will be discussed.
Application Field
The main application area of the BU407 is digital switching and analog amplification. Its high current gain, high breakdown voltage and good linearity make it suitable for a wide range of digital and analog applications.
For digital applications, the BU407 is often used for logic circuits, where its high current transfer ratio and high switching speed makes it an ideal choice for high-speed digital systems. It is also used for power switching, where its high current and high voltage capabilities make it ideal for regulating power to the load devices.
For analog applications, the BU407 is often used for linear amplification, where its low nonlinearity and low noise characteristics make it ideal for providing clean amplification of weak signals. It is also often used for audio amplification, as its high gain and low distortion make it suitable for amplifying audio signals with minimal interference.
Characteristics
The BU407 has a collector-emitter voltage max of 60V, a collector-emitter saturation voltage max of 0.6V, a collector-emitter saturation voltage current max of 10A, a collector current max of 4A and a power dissipation max of 2W. The high-current gain of the BU407 is between 75 and 400, while its low-current gain is between 70 and 120.
The BU407 features fast switching speeds and low distortion. Its rise time is between 30 and 60µs, while its fall time is between 15 and 30µs. Its distortion at 1kHz is between 0.2 and 0.5%.
Working Principle
The BU407 is a three-terminal device consisting of a base, a collector and an emitter. The collector collects electrons from the base and transports them to the emitter, where they are emitted into the circuit.
When a voltage is applied across the base-emitter junction, current starts to flow from the base to the emitter. This current is controlled by the current-gain of the transistor, which is determined by the collector-emitter voltage. The collector-emitter voltage acts as a controlling voltage for the base-emitter current, thus allowing the transistor to be used as an amplifier.
The BU407 can be used as a switch by applying a voltage to the base-emitter junction. This allows the transistor to be turned on and off, allowing it to be used as a switching device.
In summary, the BU407 is a single bipolar (BJT) transistor manufactured by NXP Semiconductors. It is widely used for analog amplification, logic circuits, switching, audio amplification and power switching. It has a high current gain, fast switching speeds and low distortion, making it an ideal choice for many applications. It can be used as an amplifier or as a switch, thanks to its base-emitter current control characteristics.

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