2N3946 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 0.2 A
• Collector Dissipation: 0.36 W
• DC Current Gain (h_fe): 50 to 150
• 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 2N3946 is the 2N3250.The 2SC3803 (SOT-89) and FMMT3903 (SOT-23) is the SMD version of the 2N3946 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.