BC108C Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 20 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.1 A
• Collector Dissipation: 0.3 W
• DC Current Gain (h_fe): 420 to 800
• Transition Frequency, min: 150 MHz
• Noise Figure, max: 2 dB
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-18

Here is an image showing the pin diagram of this transistor.The BC108C transistor can have a current gain of 420 to 800. The gain of the BC108 will be in the range from 110 to 800, for the BC108A it will be in the range from 110 to 220, for the BC108B it will be in the range from 200 to 450.The MMBT5089 (SOT-23) and MMBTH10 (SOT-23) is the SMD version of the BC108C transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BC108C with the BC109 or BC109C.