The BSD5C051V with TVS SOD-523 RoHS is a 5V transient voltage prevention device manufactured by Bourne. It has a unidirectional symmetric/asymmetric protection diode configuration that can protect a circuitry from electrostatic discharge, lightning surge, and other transients. It has a low capacitance, low power, and fast response time, making it suitable for high-speed and low-power circuits. Additionally, it has an RoHS-compliant lead-free construction, making it suitable for the prevention of electrical overload in sensitive electronic circuits.