2N2222 NPN Switching Transistor

The 2N2222A is a widely used NPN bipolar junction transistor built for general-purpose low-power amplifying and switching tasks in hobbyist and educational electronics projects. When no signal reaches the base, the collector and emitter stay open, but applying a signal closes the circuit and lets current flow, making it a fundamental building block for switching circuits.

With a gain value between 110 and 800, it offers solid amplification capacity for its size, while a maximum collector current of 800mA gives it enough headroom for small motors, relays, and LED arrays. Available in the compact TO-92 package, it is a staple component for anyone building switching circuits, motor speed controllers, or Darlington pair configurations on a breadboard or PCB.

• NPN bipolar junction transistor – general-purpose switching and amplification
• DC current gain (hFE) – 100 to 300, suited to amplifier circuits
• Continuous collector current – up to 800mA
• Collector-emitter voltage – rated up to 40V
• TO-92 package – breadboard and PCB friendly
• Versatile applications – switching, motor speed control, Darlington pairs

Build reliable switching and amplifier circuits with the 2N2222 NPN Switching Transistor.