2SC3439 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 25 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 1.5 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 400 to 1800
• Transition Frequency, min: 130 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-89

Here is an image showing the pin diagram of this transistor.The 2SC3439 transistor can have a current gain of 400 to 1800. The gain of the 2SC3439-G will be in the range from 400 to 800, for the 2SC3439-H it will be in the range from 600 to 1200, for the 2SC3439-J it will be in the range from 900 to 1800.Sometimes the "2S" prefix is not marked on the package - the 2SC3439 might only be marked "C3439".The complementary PNP transistor to the 2SC3439 is the 2SA1369.You can replace the 2SC3439 with the 2STF1340 or 2STF1550.