The LL4448 is a high-speed switching diode with a peak reverse voltage of 100V and a maximum forward current of 150mA. This small signal diode is typically used in high-speed switching applications, rectification, and detection circuits. It has a fast switching time of 4ns, making it ideal for fast switching operations. The LL4448 is housed in a SOD-80 package, which is a miniature surface mount package. This diode has a low leakage current and is capable of operating in temperatures ranging from -65°C to 175°C. Overall, the LL4448 is a reliable and efficient diode for various electronic applications