The 1SMA5930-AU is a two-terminal Zener diode with SMA (Surface Mount Assembly) casing manufactured by Panjit. It is RoHS (Restriction of Hazardous Substances) compliant, meaning that it does not contain any toxic materials such as lead and mercury. The diode is designed for lower power applications such as EMI suppression, voltage clamping, and general purpose protection circuits, as well as for more specialized uses, such as television receiver protection and DC/DC converter clamps. This diode has a maximum power rating of 0.25 watts, a maximum voltage of 5.9 volts, a maximum current of 0.5 amps, and a maximum surge current of 15 amps.