BC177B Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -45 V
• Collector-Base Voltage, max: -50 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: 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 BC177B transistor can have a current gain of 240 to 500. The gain of the BC177 will be in the range from 125 to 500, for the BC177A it will be in the range from 125 to 260.The complementary NPN transistor to the BC177B is the BC107B.The 2SA812 (SOT-23), BC857 (SOT-23), BC857B (SOT-23), BC857BW (SOT-323), BC857W (SOT-323), BC860 (SOT-23), BC860B (SOT-23), BC860BW (SOT-323), BC860W (SOT-323), BCW70 (SOT-23), BCW70LT1 (SOT-23), BCW70LT1G (SOT-23), BCW72 (SOT-23), BCW72LT1 (SOT-23), BCW72LT1G (SOT-23), KSA812 (SOT-23), KST5086 (SOT-23) and MMBT5086 (SOT-23) is the SMD version of the BC177B transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BC177B with the 2N3496 or BCY71.