This part is a kind of semiconductor called BCX41.

Function of this product has NPN SILICON PLANAR EPITAXIAL TRANSISTOR.

Manufacturers : CDIL

Image and pinout :

Some of the text within the PDF file :

Continental Device India Limited An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company NPN SILICON PLANAR EPITAXIAL TRANSISTOR PIN CONFIGURATION (NPN) 1 = BASE 2 = EM ITTER 3 = COLLECTOR 3 BCX41 SOT-23 Formed SMD Package 1 MARKING BCX41=EK Medium Power Transistor ABSOLUTE MAXIMUM RATINGS (Ta=25ºC) DESCRIPTION SYMBOL Collector Emitter Voltage VCES Collector Emitter Voltage VCEO Emitter Base Voltage VEBO Peak Pulse Current ICM Continuous Collector Current IC Base Current IB Power Dissipation Ptot Operating and Storage Temperature Range Tj,Tstg 2 VALUE 125 125 5.0 1.0 800 100 330 - 55 to +150 UNITS V V V A mA mA mW ºC Electrical Characterstics (Ta=25ºC unless specified otherwise) DESCRIPTION SYMBOL CONDITIONS Collector Base Cut Off Current ICES VCE=100V, [ ... ]

BCX41 PDF Datasheet Download