BC327-40,112

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Transistor Type:	PNP
Current - Collector (Ic) (Max):	500mA
Voltage - Collector Emitter Breakdown (Max):	45V
Vce Saturation (Max) @ Ib, Ic:	700mV @ 50mA, 500mA
Current - Collector Cutoff (Max):	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	250 @ 100mA, 1V
Power - Max:	625mW
Frequency - Transition:	80MHz
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:	BC327

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Introduction

The BC327-40,112 is a type of bipolar junction transistor (BJT). It is considered to be a single transistor and is used to amplify electrical signals and to switch electronic circuits. It is most often used in electronic circuits and electronic components like operational amplifiers, embedded controllers and analog and digital signal processing circuits.

Characteristics

The BC327-40,112 is an NPN bipolar junction transistor (BJT). It is a three-terminal device that consists of two layers - the base layer and the collector layer and an emitter layer. It is available in standard plastic packages with an improved thermal conduction that ensure better heat dissipation. The BC327-40,112 has a low collector to emitter saturation voltage, a high current gain, a high gain-bandwidth product, a high collector to emitter voltage and a moderate base drive current.

Applications

The BC327-40,112 is typically used in low-noise and low-power amplifier circuits, oscillators, voltage regulators and logic circuits. It is also used in analog signal processing circuits such as video amplifiers, video switchers, comparators and video amplifier stages. The BC327-40,112 is suitable for interfacing between analog and digital circuits such as A/D converters, multiplexers, latches and buffers. In addition, it is used in Discrete-Time (DT) and Continuously-Time (CT) circuits, both of which are important parts of digital signal processing.

Working Principle

The BC327-40,112 works by generating voltage or current gain between the collector and the emitter, and between the base and the emitter. It is operated in the active operating region of the two layer transistor.In the active operating region, the collector and the emitter are connected to a voltage source, and the base is connected to a separate current source. When a voltage is applied to the base, it creates a current flow from the collector to the emitter, which is amplified by the base to emitter voltage. The current gain is given by the ratio of the collector current to the base current.When the base current is increased, the collector current increases exponentially, until it reaches the saturation value. This occurs when the base current is equal to the collector current. The current gain is no longer active, and the transistor is said to be in the saturation region. At this point, the collector current can no longer be controlled by a change in the collector-emitter voltage, and the base current must be reduced for the transistor to operate in the active region again.

Conclusion

The BC327-40,112 is a popular type of bipolar junction transistor that is used to amplify electrical signals and to switch electronic circuits. It is most often used in operational amplifiers, embedded controllers, analog and digital signal processing circuits, video amplifiers, video switchers, comparators and video amplifier stages. It works by generating voltage or current gain between the collector and the emitter, and between the base and the emitter. It is operated in the active operating region of the two layer transistor. The uses of the BC327-40,112 are wide ranging and are typical in any application where a bipolar junction transistor or an amplifier circuit is involved.

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