The MMSZ4704T1G is a single Diode Zener manufactured by ON Semiconductor. It is a 17V Zener diode, with a 5% tolerance and a power rating of 500mW. The diode is packaged in a 2-pin SOD-123 surface mount package, and is designed to be used in applications such as clamping, voltage regulation, and waveform shaping. It is also suitable for use in general-purpose designs.