BC489A

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	500mA
Voltage - Collector Emitter Breakdown (Max):	80V
Vce Saturation (Max) @ Ib, Ic:	300mV @ 100mA, 1A
Current - Collector Cutoff (Max):	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	100 @ 100mA, 2V
Power - Max:	625mW
Frequency - Transition:	200MHz
Operating Temperature:	-55°C ~ 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:	BC489

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BC489A application field and working principleThe BC489A is a type of transistor known as a bipolar junction transistor (BJT). It is used for a variety of general purpose applications, and is widely used in consumer devices such as computers and mobile phones.The BC489A is a three-terminal, single-component amplifier device that is able to control a large current with a small input current. This type of transistor is electrically equivalent to two back-to-back diodes, with the base terminal as the control junction.The primary function of the BC489A is amplification. It takes a small current on its base terminal and amplifies it to a larger current on its collector terminal. The amplified current is then used to control a larger current load by passing through a larger power supply in the form of voltage.The BC489A can also be used as a switch. When the gate receives a small current, the base current is amplified and the transistor is switched on, passing the large current load. This allows the transistor to switch quickly and with very low power consumption.In addition, the BC489A is also used in current-level sensing, phase splitting, and limiting applications. The transistor\'s high power rating and low power consumption makes it ideal for these types of applications.The working principle of the BC489A is based on the concepts of positive-feedback and Emitter Follower. Its base terminal receives a small input current, which is then amplified by the transistor and passes it onto the collector terminal. The collector then passes the amplified current to the power supply in the form of a larger voltage, using the amplifier and resistor configuration of the transistor to control the large current load.The BC489A is also used in many circuits where current is required to be controlled in a very dynamic way. Its low power consumption, high power rating, and multiple applications make it an attractive choice for many applications requiring high performance and low cost.Overall, the BC489A is a highly versatile, reliable and efficient transistor that is used in many consumer electronics, computers and industrial applications. Its flexibility and consistent quality make it a reliable choice for any application.

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