The 1SMA4740A is a Zener diode with SMA (surface mount assembly) package manufactured by LGE, offering RoHS compliant. This diode is used to generate a regulated stable voltage output from an AC or DC source. It can be used in AC/DC power supplies, battery management, voltage regulating and other electronic applications. The 1SMA4740A has a breakdown voltage of 4.7V, and it can handle up to 1A of current. Its operating temperature range is -55°C to +125°C, and it has a maximum reverse leakage current of 0.5mA.