The Prisemi PESDHC3D3V3U 9V 5V 3.3V SOD-323 TVS ROHS is an electronic part with a ESD (electrostatic discharge) protection diode that is used to protect the input and output ports of electronic systems from ESD. It can protect against up to 15kV ESD strikes, and also delivers a low capacitance close to 0.7pF. This part is available in a package size of SOD-323, which is a very small, surface-mount package. It is RoHS compliant, and is also used in many devices for high-speed signal or data line protection.