The 2N2222A transistor offers a constant DC collector current of 800 mA, so, loads that consume more than 800 mA current cannot be connected using this transistor.įor biasing current is supplied to the base pin (I B) which should be under 5 mA. 2N2222A has a gain value of 110 to 800 which determines its amplification value. The collector and emitter are left open when the base pin is held at the ground and are closed when a signal is provided to the base pin. This pin allows the current to come out of the transistor.Īs mentioned earlier, in the 2N2222A transistor, the dopped layer is embedded between two n-dopped layers. This pin controls the biasing of the transistor. This pin allows the current to enter the transistor form here. 2N2222A Transistor Pin Configuration, Pin diagram, Pinout Pin No. The pin configuration/pin diagram and functionality of the 2N2222A Transistor are shown below. It consists of three terminals namely, collector, base, and emitter. It is commonly used in very high-frequency amplifiers.ĢN2222A Transistor Pin Configuration/Pin diagram/Pinout Hence, we can say that it is ideal for applications that require low to medium current. Therefore, when the 2N2222A transistor is fully biased, then it allows a maximum of 800 mA current to flow across the collector emitter. It also offers a constant DC collector current like 800 mA. It is accessible in the package of To-92.

It is a current controlled transistor, specially outlined to have fairly high speed even in low power, low to medium current, and medium voltage.

Since it’s an NPN transistor so the collector and emitter are reverse biased and the base is forward biased. It is a common NPN Bipolar Junction Transistor i.e., one P-doped layer stands between the two N-doped layers. Like every other amplifier, even a 2N2222A transistor is also used for amplification and switching. Working Principle of 2N2222A Transistor.

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