The RB751S40T1G is a diode Schottky with 40V rated voltage and 0.03A current rating. It comes in a 2-pin SOD-523 package, and is manufactured by ON Semiconductor. The Schottky diode offers low reverse leakage current, low forward voltage drop, high switching speed, and good temperature characteristics. The SOD-523 package includes a small outline package, giving it a small size and a low profile with neat solder joints. It is suitable for applications that require a low power, high speed, and small form factor. The diode is widely used in various circuits and applications such as power circuit protection, telecoms systems, and automotive safety systems.