BCW72LT1

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	100mA
Voltage - Collector Emitter Breakdown (Max):	45V
Vce Saturation (Max) @ Ib, Ic:	250mV @ 500µA, 10mA
Current - Collector Cutoff (Max):	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	200 @ 2mA, 5V
Power - Max:	300mW
Frequency - Transition:	300MHz
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3 (TO-236)
Base Part Number:	BCW72

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Introduction
BCW72LT1 is a single bipolar junction transistor (BJT). As one of the most commonly used electronic components, BJT has a wide application in electronic engineering due to its low cost and low power consumption. BCW72LT1 is a PNP type BJT which is especially suitable for audio and linear amplifying applications.
Application Field
As a PNP type BJT, BCW72LT1 is mainly used in audio amplification, complementing NPN transistors. Due to its high breakdown voltage, low saturation voltage and low noise figure, BCW72LT1 is especially suitable for applications such as audio power amplifiers and preamplifiers, motor drivers, and switching transistors. Its low noise figure also makes it suitable for use in sensitive audio signals. BCW72LT1 has a wide variety of uses in home appliances, such as in televisions, radios, and other audio and audio-visual devices.
Working Principle
BCW72LT1 is a two-layer semiconductor device which includes two p-type semiconductor layers and one n-type semiconductor layer, forming a p-n-p structure. When current passes through the collector and passes the base, it can flow across the collector-base junction, allowing a current to control a larger current flowing from the collector to the emitter. The base current, which is determined by the current gain of the transistor, helps to control the larger collector current and define the magnitude of current amplification that is taking place. The amount of current amplification is determined by the current gain, which is measured by the DC gain of the transistor, usually indicated by the symbol hFE. Generally speaking, the higher the hFE of a transistor, the higher the gain and vice versa.
Conclusion
BCW72LT1 is a general-purpose single PNP transistor that is designed to be used in audio and linear amplification applications. Its wide application range makes it suitable for various home appliances, such as TVs and radios, as well as sensitive audio signals. Its low noise figure, high breakdown voltage and low saturation voltage make it especially suitable for motor drivers and switching transistors. Its current gain is determined by its DC gain, indicated by its hFE, and the higher its hFE, the higher its current gain.

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