The BSR43TA is a small-signal switching transistor in a SOT-23 surface-mount package. It is designed for use in high-speed switching applications, particularly in areas of telecommunications and digital electronics. The BSR43TA features a collector current of 0.1A, a collector-base voltage of 80V, and a collector-emitter voltage of 80V. It has a low saturation voltage, making it ideal for applications where efficiency is important. The transistor has a high transition frequency of 400MHz, allowing for fast switching speeds. The SOT-23 package is compact and easy to mount on a PCB, saving space and simplifying the manufacturing process. Overall, the BSR43TA is a reliable and efficient discrete semiconductor component for high-speed switching applications