2SC3902 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 160 V
• Collector-Base Voltage, max: 180 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 1.5 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 100 to 400
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126F

Here is an image showing the pin diagram of this transistor.The 2SC3902 transistor can have a current gain of 100 to 400. The gain of the 2SC3902-R will be in the range from 100 to 200, for the 2SC3902-S it will be in the range from 140 to 280, for the 2SC3902-T it will be in the range from 200 to 400.Sometimes the "2S" prefix is not marked on the package - the 2SC3902 might only be marked "C3902".The complementary PNP transistor to the 2SC3902 is the 2SA1507.You can replace the 2SC3902 with the 2SC3117.