This is a surface mount bi-directional transil (Transient Voltage Suppression) device with a voltage rating of 13.6V, 8.89V, and 8V, and is designed for suppressing high voltage transients caused by lightning and other inductive switching events. It has an SMB (DO-214AA) form factor and is compliant with ROHS (Restriction of Hazardous Substances) standards. This device is manufactured by SEMIWARE.