2SC3789 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 300 V
• Collector-Base Voltage, max: 300 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.1 A
• Collector Dissipation: 7 W
• DC Current Gain (h_fe): 40 to 320
• Transition Frequency, min: 70 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 2SC3789 transistor can have a current gain of 40 to 320. The gain of the 2SC3789-C will be in the range from 40 to 80, for the 2SC3789-D it will be in the range from 60 to 120, for the 2SC3789-E it will be in the range from 100 to 200, for the 2SC3789-F it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SC3789 might only be marked "C3789".The complementary PNP transistor to the 2SC3789 is the 2SA1479.The PMBTA42 (SOT-23) is the SMD version of the 2SC3789 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC3789 with the 2SC2899, 2SC3417, 2SC3503, 2SC3790, BD128, BD129, KSC2258A or KSC3503.