This part is a kind of semiconductor called SM945.

Function of this product has NPN Silicon Transistor.

Manufacturers : OEI

Image and pinout :

Some of the text within the PDF file :

SM945 NPN Silicon Transistor FEATURES TO-92 Collector-Base Voltage VCBO = 60V Complement to SM733 1. Emitter 2. Collector 3. Base ABSOLUTE MAXIMUM RATINGS (TA=25℃) Characteristic Collector-Base Voltage Collector-Emitter Voltage Emitter-Bias Voltage Collector Current Collector Power Dissipation Junction Temperature Storage Temperature Symbol VCBO VCEO VEBO IC PC TJ Tstg SM945 60 50 5 150 400 150 -55 to +150 Unit V V V mA mW ℃ ℃ ORDERING INFORMATION Part Number SM945P Operating Temperature Range -55℃~+150℃ Package Type TO-92 hFE Classification Classification hFE R 90-180 Q 135-270 P 200-400 K 300-600 OEI 1/ 2 SM945 NPN Silicon Transistor ELECTRICAL CHARACTERISTICS (T =+25℃). A Characteristics Collector-Base Breakdown Voltage I [ ... ]

SM945 PDF Datasheet Download