2SC3478-K Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 180 V
• Collector-Base Voltage, max: 200 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.1 A
• Collector Dissipation: 0.75 W
• DC Current Gain (h_fe): 200 to 400
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SC3478-K is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads.
Here is an image showing the pin diagram of this transistor.The 2SC3478-K transistor can have a current gain of 200 to 400. The gain of the 2SC3478 will be in the range from 135 to 600, for the 2SC3478-L it will be in the range from 135 to 270, for the 2SC3478-U it will be in the range from 300 to 600.Sometimes the "2S" prefix is not marked on the package - the 2SC3478-K might only be marked "C3478-K".The complementary PNP transistor to the 2SC3478-K is the 2SA1376-K.You can replace the 2SC3478-K with the 2SC2230A, 2SC2230A-GR, 2SC3478A or 2SC3478A-K.