BUY PST1431A https://www.utsource.net/itm/p/9511917.html

Description: The PST1431A is a NPN transistor manufactured by Mitsumi. Features: Collector-Emitter Voltage: 60V Collector-Base Voltage: 60V Emitter-Base Voltage: 5V Collector Current: 0.2A Power Dissipation: 500mW Operating Temperature Range: -55°C to +150°C Application: The PST1431A is a general purpose NPN transistor that can be used in a variety of applications such as switching, amplifying, and signal processing. It is most commonly used in low power switching applications. (For reference only)