BC549BBU

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	100mA
Voltage - Collector Emitter Breakdown (Max):	30V
Vce Saturation (Max) @ Ib, Ic:	600mV @ 5mA, 100mA
Current - Collector Cutoff (Max):	15nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	200 @ 2mA, 5V
Power - Max:	500mW
Frequency - Transition:	300MHz
Operating Temperature:	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:	BC549

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Introduction to BC549BBU

BC549BBU is a single bipolar junction transistor (BJT) that is widely used for various applications. It is a very useful transistor for both low and high frequency applications. It is also known for its stability, reliability, and easy usage.

Characteristics of BC549BBU

The BC549BBU transistor has a common collector configuration with a current gain (hfe) of 70 to 200. It has an operating voltage range of 60V and a maximum power dissipation of 625mW. It also has a high input impedance and a low output impedance, making it suitable for use in high frequency applications.This transistor has a collector-base cutoff current of 1.2mA and a base-emitter cutoff current of 15uA, which means that it has a relatively high switching speed. The BC549BBU is also capable of handling high current densities of up to 50mA/mm.

BC549BBU Applications

The BC549BBU transistor is most commonly used in amplifier applications. It can also be used for switching applications such as driving relay coils, LEDs, and other low-power devices. It can also be used for voltage regulators, oscillators, logic circuits, and instrumentation amplifiers.The use of this transistor in amplifier applications requires proper biasing with resistors. It is also important to select a suitable power supply for the circuit. The BC549BBU is also well suited for power switching applications, as its high current density makes it well suited for driving heavy loads.

BC549BBU Working Principle

The BC549BBU is a bipolar transistor, which means that it consists of three terminals: the base, collector, and emitter. It operates in a manner similar to an electric switch, in that an input signal at the base causes current to flow between the collector and emitter terminals.The input signal at the base controls the current from the collector to the emitter. When the base voltage is increased, more current flows from the collector to the emitter, increasing the current gain (hfe). When the base voltage is decreased, the current from the collector to the emitter decreases, reducing the current gain (hfe).The output current of the BC549BBU is proportional to the base-emitter voltage and this is known as the base-emitter current gain (hfe). The base-collector current gain (hfe) is also dependent on the collector current, which can be controlled by adjusting the base-emitter voltage.

Conclusion

The BC549BBU is a single bipolar junction transistor that has a wide range of applications. It is well suited for both low and high frequency applications and has a high current density. It has a current gain of 70 to 200 and can be used for amplifier and switching applications. The BC549BBU works on the principle of controlling current flow between the collector and emitter terminals, which is done by controlling the base-emitter voltage.

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