Transistor 2N2222

Transistor 2N2222 NPN, 0.8A TO-18

Transistors

Reference: TR2N2222

Part.No: 2N2222

€1.50

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The 2N2222 is a classic NPN Bipolar Junction Transistor (BJT) in a TO-18 metal-can package. Designed for high-speed switching and general-purpose linear amplification in hobbyist, educational and vintage-style circuits.

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Description
Product Details

2N2222 NPN Transistor - The Legendary High-Speed Switch

The 2N2222 is one of the most widely referenced NPN transistors in electronics history, prized for its combination of decent current handling and fast switching speed in a compact metal TO-18 can. It remains a favorite for driving relays, LEDs and small loads directly from microcontroller outputs, as well as for teaching transistor biasing fundamentals in classrooms and hobby labs.

Functions & Applications

Decent Current Handling: Rated for up to 800mA continuous collector current, suitable for small relays and motors.
Fast Switching: Transition frequency around 250MHz makes it capable of quick on/off transitions and basic RF/VHF experiments.
Rugged Metal TO-18 Can: Durable hermetic package favored in vintage-style builds and situations needing better thermal handling than plastic cases.
MCU Compatible: Easily driven from 3.3V/5V logic outputs of Arduino, ESP32 and similar boards with an appropriate base resistor.
Well-Documented Legacy Part: Decades of published application notes and reference designs make troubleshooting straightforward.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-18
Collector-Emitter Voltage (Vceo)	30V
Collector-Base Voltage (Vcbo)	60V
Max Collector Current (Ic)	800mA
Power Dissipation (Pd)	500mW
Transition Frequency (fT)	~250MHz
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: What is the complementary PNP part for the 2N2222?
A: The complementary PNP transistor is the 2N2907.

Q: Can the 2N2222 directly drive a small 12V relay?
A: Yes, as long as the relay coil current stays below 800mA (Ic) and Vce rating (30V) is respected. Use a flyback diode across the coil and size the base resistor for saturation.

Notes

This is the classic TO-18 metal-can variant of the 2N2222 family (not the plastic TO-92 2N2222A commonly sold today) - check your circuit's mechanical/pinout requirements before substituting.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: NPN
Transistor Case Style: TO-18

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