The SMAFJ12A is an electronic part manufactured by Jingdao, featuring 19.9V, 13.3V and 12V SMA-F Transient Voltage Suppressor (TVS) technology. It is ROHS compliant, meaning that it has been designed, manufactured, and tested to meet the requirements of the Restriction of Hazardous Substances directive issued by the European Union. This part can be used in board-level protection applications to provide protection against electrostatic discharge (ESD), lightning, and other transients.