2N2221 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 30 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.8 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 40 to 120
• Transition Frequency, min: 250 MHz
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-18

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the 2N2221 is the 2N2906.The PN2221 is the TO-92 version of the 2N2221.