This part is a kind of semiconductor called BCX41.

Function of this product has NPN SILICON PLANAR MEDIUM POWER TRANSISTOR.

Manufacturers : Zetex Semiconductors

Image and pinout :

Some of the text within the PDF file :

SOT23 NPN SILICON PLANAR MEDIUM POWER TRANSISTOR ISSUE 3 –OCTOBER 1995 7 BCX41 2 PARTMARKING DETAIL – EK 1 3 ABSOLUTE MAXIMUM RATINGS. PARAMETER Collector-Emitter Voltage Collector-Emitter Voltage Emitter-Base Voltage Peak Pulse Current Continuous Collector Current Base Current Power Dissipation at Tamb=25°C Operating and Storage Temperature Range PARAMETER SYMBOL VCES VCEO VEBO ICM IC IB PTOT Tj:Tstg VALUE 125 125 5 1 800 100 330 -55 to +150 UNIT V V V A mA mA mW °C ELECTRICAL CHARACTERISTICS (at Tamb = 25°C unless otherwise stated). SYMBOL MIN. TYP. MAX. UNIT CONDITIONS. 100 10 10 75 100 0.9 1.4 25 63 40 100 12 µA µA µA Collector-Base Cut-Off ICES Current Collector Cut-Off Current Emitter Cut-Off Current Collector-Emitter Saturation Voltage Base-Emitter Saturation Voltage I [ ... ]

BCX41 PDF Datasheet Download