BD681 Discrete Semiconductor Products

Series:	--
Packaging:	Tube
Part Status:	Active
Transistor Type:	NPN - Darlington
Current - Collector (Ic) (Max):	4A
Voltage - Collector Emitter Breakdown (Max):	100V
Vce Saturation (Max) @ Ib, Ic:	2.5V @ 30mA, 1.5A
Current - Collector Cutoff (Max):	500µA
DC Current Gain (hFE) (Min) @ Ic, Vce:	750 @ 1.5A, 3V
Power - Max:	40W
Frequency - Transition:	--
Operating Temperature:	150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-225AA, TO-126-3
Supplier Device Package:	SOT-32-3
Base Part Number:	BD681

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Introduction to the BD681

The BD681 is a PNP transistor used for various applications. It has a maximum collector-base doping of 1.5 W, and a maximum collector-emitter breakdown voltage of 80 V. The device can operate at temperatures up to 175°C and has a maximum collector current of 2.0 A.

Application Field and Working Principle

The BD681 is a general purpose transistor and is used in many types of logic and power applications. As a logic device, it is often used as a switch, where it is used to control the flow of current and turn circuits on or off. As a power device, it is used to amplify signals, provide voltage/current regulation, and provide power-switching capabilities.The way it works is simple. When a voltage is applied to the base of the BD681, the current begins to flow between the base and emitter. This current flow causes a voltage drop between the base and emitter, causing the collector current to increase. The collector current then flows to the output, providing the desired control of current flow.

Advantages and Disadvantages

There are several advantages to using the BD681. The first is that it is easy to use, requiring no complicated wiring or programming. Additionally, since the BD681 is a PNP transistor, it can handle both positive and negative voltage. This means it can be used to control various types of circuits. The BD681 also has a relatively low power dissipation compared to other types of transistors, making it suitable for use in applications with limited power.On the other hand, the BD681 has some drawbacks. The power dissipation is lower than other transistors, but the BD681 has a lower collector-to-base breakdown voltage than other transistors, which can cause it to fail if the voltage is exceeded. Additionally, the BD681 can only handle a maximum collector current of 2.0 A, so it\'s not suitable for applications that require higher amounts of current.

Conclusion

The BD681 PNP transistor is a general-purpose device used for both logic and power applications. It is an easy to use device and can handle both positive and negative voltages, making it versatile. However, it has some drawbacks, such as lower than average power dissipation and a maximum collector current of 2.0 A. Despite these drawbacks, the BD681 is a reliable and cost-effective device and can be used for a variety of applications.

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