2N2222A metal package

The 2N2222A metal package is the general-purpose 2N2222A NPN transistor in a TO-18 metal can instead of the more common plastic TO-92. It switches relays, LEDs, buzzers and small motors from microcontroller pins and works well in small-signal amplifiers and oscillators. The rugged metal case can also take a clip-on heatsink.

2N2222A metal package Specifications

• Type: NPN bipolar junction transistor (BJT)
• Package: TO-18 metal can, 3 leads, through-hole
• Collector-emitter voltage (VCEO): 40 V
• Collector-base voltage (VCBO): 75 V
• Emitter-base voltage (VEBO): 6 V
• Collector current (IC): up to 600 mA continuous
• DC current gain (hFE): 100–300 at 150 mA
• Transition frequency (fT): 300 MHz minimum
• Pack size: 1 piece

2N2222A metal package Applications

• Switching relays, LEDs, buzzers and small DC motors from Arduino and ESP32 pins
• Small-signal and audio amplifier stages
• Oscillator and RF circuits
• Repairing older equipment that uses metal-can transistors
• Electronics education and labs

What's in the Box

• 1 × 2N2222A NPN transistor, TO-18 metal package

Tip: In the TO-18 package the metal case is connected to the collector, so do not let it touch other parts or a grounded chassis. The small tab on the rim marks the emitter; seen from below, the leads go emitter, base, collector from the tab. Use a base resistor of about 1 kΩ from a 5 V pin and a flyback diode across relay coils.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.