The SMA5931B with 500nA@13.7V ±5% 12O Single 1.5W 18V is a surface mount (SMA) Zener diode manufactured by DOWO. It has a breakdown voltage of 13.7V, provides a current of 500nA and a power rating of 1.5W. This diode also has a tolarance of ±5%, a resistance of 12O, and is compliant with RoHS (Restriction of Hazardous Substances) safety standards. The SMA5931B is used for voltage regulation and is suitable for a variety of applications that require low quiescent current, stable temperature performance, and low noise.