BC179B 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): 240 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 BC179B transistor can have a current gain of 240 to 500. The gain of the BC179 will be in the range from 125 to 500, for the BC179A it will be in the range from 125 to 260.The complementary NPN transistor to the BC179B is the BC109B.You can replace the BC179B with the BC178, BC178B, BC479, BCY70 or BCY72.