The ESDA33CT with 12V 4V 3.3V SOD-523 TVS ROHS is an electronic component, manufactured by Leiditech, that provides protection against electrostatic discharge (ESD). It is designed to protect a variety of port types, including USB, RS-232, data lines, and components on PCBs. This component is RoHS compliant and made in a SOD-523 package. The SOD-523 is a very small surface-mount package, allowing it to fit in even the tightest of locations. The device has an operating voltage range of up to 12V, 4V, and 3.3V, making it compatible with many different voltage levels. In addition, the device provides protection up to ±30kV contact and ±2kV air discharge. It also offers excellent clamping performance and low capacitance for high-speed data line protection.