2N3634 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -140 V
• Collector-Base Voltage, max: -140 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 5 W
• DC Current Gain (h_fe): 50 to 150
• Noise Figure, max: 5 dB
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The FMMT555 (SOT-23) is the SMD version of the 2N3634 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2N3634 with the 2N3636 or 2N5415.