This part is a kind of semiconductor called 2N5401.

Function of this product has Amplifier Transistor.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

2N5401 Amplifier Transistors PNP Silicon Features • These are Pb−Free Devices* MAXIMUM RATINGS Rating Symbol Value Unit Collector − Emitter Voltage Collector − Base Voltage Emitter − Base Voltage Collector Current − Continuous Total Device Dissipation @ TA = 25°C Derate above 25°C VCEO VCBO VEBO IC PD 150 Vdc 160 Vdc 5.0 Vdc 600 mAdc 625 mW 5.0 mW/°C Total Device Dissipation @ TC = 25°C PD 1.5 W Derate above 25°C 12 mW/°C Operating and Storage Junction Temperature Range TJ, Tstg −55 to +150 °C THERMAL CHARACTERISTICS Characteristic Symbol Max Unit Thermal Resistance, Junction−to−Ambient RqJA 200 °C/W Thermal Resistance, Junction−to−Case RqJC 83.3 °C/W Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress r [ ... ]

2N5401 PDF Datasheet Download