The PTVSLC3D3V3B is a bidirectional transient voltage suppressor (TVS) diode in a SOD-323 package, manufactured by Prisemi. It is RoHS compliant, and is used to protect against ESD, lightning strikes, and other overvoltage transients. The device operates with a voltage range from 21V to 4V, and a peak pulse power rating of 500W. It offers a clamping voltage of 3.3V, and a low capacitance of 4.5pF. The device is widely used in applications such as automotive, serial data lines, consumer electronics, and telecommunications.