The 1SMA4734AG is a Zener Diode manufactured by Shikues. It is an SMA (Surface Mount Assembly) type part, designed to be RoHS (Restriction of Hazardous Substances) compliant for use in electronic circuits. It has a maximum reverse voltage of 3.3 V and a maximum power dissipation rating of 500 mW. The operating temperature range is from -55°C to 150°C.