The SE8117T18HF is a linear voltage regulator manufactured by Seaward packaged in a SOT-223 package and compliant with RoHS (Restriction of Hazardous Substances) requirements. This device is a low drop-out voltage regulator designed to provide a regulated output voltage of 3.3V from an input voltage of +4.5V to +28V, with an adjustable output current capability of up to 1.8A. The SE8117T18HF includes a range of features such as short-circuit protection, current-limit over-temperature protection, and its current limiting feature acts as a system overload protection system. The device also features an internal temp-sense pin which helps monitor and protect the device from overheating, providing long term reliability and stability. With a wide input voltage range, the SE8117T18HF is suitable for a variety of applications, such as powering microcontrollers, signal conditioning circuits, and other applications requiring an output voltage of 3.3V.