Bipolar (BJT) Transistor NPN 30V mA MHz mW Through Hole TO The 2N transistor is very much similar to the commonly used NPN transistor 2N, but it comes in a metal can package and can operate on voltages. 7 May Sep 2. Philips Semiconductors. Product specification. NPN switching transistors. 2N; 2NA. FEATURES. • High current (max.
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This stage is called Saturation Region. Overall it is just another small signal transistor which is commonly 2nn2219 in switching and amplifying circuits. Top menu About Us Advertise.
To bias a transistor we have to supply current to base pin, this current I B should be limited to 5mA by using a transistor to the base pin. When this transistor is fully biased then it can allow a maximum of mA to 2j2219 across the collector and emitter. Where Vcc is the voltage on which the load operates and V BE is the voltage across the Base and Emitter which in our case according to the data sheet 1. The 2N is a NPN transistor and is normally used as a switch in many circuits.
2N2219 Bipolar Transistor
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Since 2n219 is of NPN the load to be switched should be connected to the collector and the emitter should be connected to the ground as 2n221 in the figure below. As we know the transistor is a current controlled device meaning, we have pass some current I B thorough the base of the transistor to turn it on. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around mV.
So the value 2n22119 R B will be. The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume more than mA using this 2n219. Another important thing to keep in mind, while using a transistor as switch is the base resistor. Complete Technical Details can be found at the datasheet given at the end of this page.
This resistor is connected to the base pin of the transistor to limit the current flowing through the base. So if you looking for an NPN transistor that could switch loads or for decent amplification then 2N might the right choice for your project.
2N Transistor Pinout, Specs, Equivalent & Datasheet
So to calculate the resistor value of the base we can use the formulae. The value of this current 2h2219 be calculated by the required amount of current that will be consumed by the load.
Where h FE, is the current gain of the transistor which in our case is Current flows in through collector, normally connected to load. But this calculation will lead to the closest value to start with.
2N2219 Datasheet, Equivalent, Cross Reference Search
Current Drains out through emitter, normally connected to ground. To make this current flow through the transistor the value of base current I B can be calculated using the below formula:. However this vale will not be very accurate because the transistor will have an internal voltage drop across the collector current, so it mostly experimental to get the maximum current from the transistor.
In our case for a collector current of mA we have to pass a base current of 16mA. But it comes 2n2291 a metal can package and can operate on voltages slightly higher than what a 2N can handle. Here lets us assume the load here consumes around mA maximum so our collector current I C mA.
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