Transistor 2N2222 is a widely used NPN bipolar junction transistor (BJT) renowned for its reliability in low‑power amplification and switching tasks. Engineered for precision performance, this component delivers consistent gain and fast switching speeds, making it an essential building block for both hobbyist projects and professional designs.

Specifications

• Type: NPN BJT


• Maximum Collector‑Emitter Voltage (V_CEO): 40 V


• Maximum Collector Current (I_C): 800 mA


• Power Dissipation (P_tot): 625 mW


• Transition Frequency (f_T): 300 MHz


• Package: TO‑92


• Gain (h_FE) at 2 mA: 100 – 300


• Operating Temperature Range: -55 °C to +150 °C

Typical Applications

• Signal amplification in audio and sensor circuits


• Switching loads such as LEDs, relays, and small motors


• Pulse‑width modulation (PWM) control for motor drivers


• Level shifting and logic interfacing


• Oscillator and timer circuits


• Protection circuits and current limiting