The 1SMA4742AG with Zener Diodes SMA RoHS is a surface mount device (SMD) manufactured by Shikues. It’s primarily designed for use in standard Zener diodes applications. This device is packaged in a SMA (2-pin) package. It operates on a nominal 4.7V forward voltage bias, and has a maximum peak power dissipation of 0.75W. The 1SMA4742AG is RoHS (Restriction of Hazardous Substances) compliant and is rated for maximum continuous currents of 150mA. It features a high stability voltage regulation and fast switching speeds.