BCX79 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -45 V
• Collector-Base Voltage, max: -45 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.5 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 120 to 630
• Noise Figure, max: 6 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The BCX79 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, base, and collector leads.
Here is an image showing the pin diagram of this transistor.The 2SA1518 (SOT-23), 2SA1519 (SOT-23), 2SA1520 (SOT-23), 2SA1521 (SOT-23), BC807 (SOT-23), BC807W (SOT-323) and BCX17 (SOT-23) is the SMD version of the BCX79 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BCX79 with the KSP55, KSP56, MPS751, MPS751G, MPSA55, MPSA55G, MPSA56, MPSA56G, MPSW55, MPSW55G, MPSW56 or MPSW56G.