Diodes Incorporated, SMAZ18-13-F, Diodes, Zener Diodes

 SMAZ18-13 Series 1 W 18 V 200 mA Surface Mount Zener Diode - DO-214AC

https://www.futureelectronics.com/p/semiconductors--discretes--diodes--zener/smaz18-13-f-diodes-incorporated-5130242