This part is a kind of semiconductor called SS8550.

Function of this product has TO-92 Plastic-Encapsulate Transistors.

Manufacturers : Daya Electric

Image and pinout :

Some of the text within the PDF file :

TO-92 SS8550 TRANSISTOR (PNP) Plastic-Encapsulate Transistors TO-92 FEATURES Power dissipation PC : 1 W (TA=25℃) 1. EMITTER 2. BASE 3. COLLECTOR MAXIMUM RATINGS (TA=25℃ unless otherwise noted) Symbol VCBO VCEO VEBO IC Tj Tstg Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current-Continuous Junction Temperature Storage Temperature Value -40 -25 -5 -1.5 150 -55-150 Units V V V A ℃ ℃ 1 2 3 ELECTRICAL CHARACTERISTICS (Tamb=25℃ unless otherwise specified) Parameter Collector-base breakdown voltage Collector-emitter breakdown voltage Emitter-base breakdown voltage Collector cut-off current Emitter cut-off current Emitter cut-off current DC current gain Collector-emitter saturation voltage Base-emitter saturation vol [ ... ]

SS8550 PDF Datasheet Download