BC179 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -20 V
• Collector-Base Voltage, max: -25 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.1 A
• Collector Dissipation: 0.3 W
• DC Current Gain (h_fe): 125 to 500
• Transition Frequency, min: 200 MHz
• Noise Figure, max: 1.2 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 BC179 transistor can have a current gain of 125 to 500. The gain of the BC179A will be in the range from 125 to 260, for the BC179B it will be in the range from 240 to 500.The complementary NPN transistor to the BC179 is the BC109.You can replace the BC179 with the BC178, BCY70 or BCY72.