FMMT459 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 450 V
• Collector-Base Voltage, max: 500 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 0.15 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 50
• Transition Frequency, min: 50 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The FMMT459 transistor is marked as "459".You can replace the FMMT459 with the PMBTA45 or STR1550.