This post describes for the PNP transistor.
The Part Number is S8550.
The function of this semiconductor is TRANSISTOR (PNP).
The manufacturer of this part is Wing Shing Computer Components.
See the preview image and the PDF file for more information.
The S8550 is a low voltage high current small signal PNP transistor, designed for Class B push-pull audio amplifier and general purpose applications.
1. Power dissipation PCM : 0.625 W（Tamb=25℃）
2. Collector current ICM : 0.5 A
3. Collector-base voltage V(BR)CBO : 40 V