The RB521S-30 is an SBD SOD-523 RoHS manufactured by Microdiode Electronics. It is designed to provide protection from reverse bias surges and lightning strikes on electronic circuits, and is a low power Schottky barrier diode. The diode offers fast switching speeds and low capacitance. It is ideal for use in low-power applications, such as PC and telecom boards that require low forward voltage drop or for applications that require low reverse leakage. The device's package includes a compact SOD-523 form factor, allowing flexible board layout and design. The RB521S-30 is RoHS-compliant, making it a product of choice for companies needing low power management and reliable over voltage protection.