This part is a kind of semiconductor called 2N5401.

Function of this product has PNP General Purpose Amplifier.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

2N5401 / MMBT5401 Discrete POWER & Signal Technologies 2N5401 MMBT5401 C E C BE TO-92 SOT-23 Mark: 2L B PNP General Purpose Amplifier This device is designed as a general purpose amplifier and switch for applications requiring high voltages. Sourced from Process 74. Absolute Maximum Ratings* Symbol VCEO VCBO VEBO IC TJ, Tstg Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Collector Current - Continuous TA = 25°C unless otherwise noted Parameter Value 150 160 5.0 200 -55 to +150 Units V V V mA °C Operating and Storage Junction Temperature Range *These ratings are limiting values above which the serviceability of any semiconductor device may be impaired. NOTES: 1) These ratings are based on a maximum junction temperature of 150 degrees C. 2) These are s [ ... ]

2N5401 PDF Datasheet Download