The SS8550 manufactured by Shikues is an NPN-PNP PNP 1.5A 25V SOT-23 (SOT-23-3) RoHS transistor. It is a transistor integrated circuit (IC) with three pins. This makes it a popular choice for small size applications, such as portable electronics. It is specifically designed to perform linear-output functions, such as amplifying and switching. Its operating frequency has a range of up to 400 MHz, making it suitable for various applications, such as radio frequency and switching. The SS8550 has excellent current gain characteristics, with a maximum limit of 300 mA. Additionally, it can dissipate power up to 1.5 watts, making it well suited for applications demanding high power. Its temperature range is from -55°C to +150°C. This makes it suitable for outdoor applications as well. The SS8550 is RoHS compliant, meaning it meets all the requirements of the Restriction of Hazardous Substances directive.