2SC108A-O Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 70 V
• Collector-Base Voltage, max: 90 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.8 A
• Collector Dissipation: 0.8 W
• DC Current Gain (h_fe): 70 to 140
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The 2SC108A-O transistor can have a current gain of 70 to 140. The gain of the 2SC108A will be in the range from 40 to 240, for the 2SC108A-R it will be in the range from 40 to 80, for the 2SC108A-Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SC108A-O might only be marked "C108A-O".You can replace the 2SC108A-O with the 2N2405, 2N4239, 2N5154, 2N5320, 2N5321, 2N5335, 2N5337, 2N5339, 2N5681, 2N5682, 2SC510 or 2SC510-O.