2N2222 | datasheet | transistor pinout | NPN BJT Solid State Inc.
- Transistor Type: NPN
- Current-Collector(Ic)(Max): 800 mA
- Voltage-Collector Emitter Breakdown (Max): 30 V
- Package: TO-206AA, TO-18-3 Metal Can

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Transistor diagram npn and pnp 2n2222 2n3904 and 2n3906 transistors pin layout explained
2N2222 Transistor Pinout
2N2222 Transistor Pinout Diagram
The 2N2222 is a popular NPN bipolar junction transistor (BJT) widely used in electronic circuits for switching and amplification purposes. Below is a brief description of its pinout:
Pin Number | Pin Name | Description |
---|---|---|
1 | Emitter | The emitter is the terminal through which current leaves the transistor. It is typically connected to a common ground or reference voltage in most circuits. In an NPN transistor like the 2N2222, current flows from the collector to the emitter when the base is biased appropriately. |
2 | Base | The base is the control terminal of the transistor. A small current entering the base allows a larger current to flow between the collector and emitter. The base-emitter junction is forward biased for the transistor to conduct, and the base current controls the transistor’s switching action. |
3 | Collector | The collector is the input terminal where current flows into the transistor. For the transistor to function as an amplifier or switch, a current flows from the collector to the emitter, which is controlled by the base current. |
The 2N2222 is a highly versatile transistor that works effectively in both switching and amplification roles, with the base controlling the transistor’s operation between the collector and emitter.