Zener Diodes 27 Volt 0.5W 10%: Amazon.com: Industrial & Scientific
Set of 50, Diode 1N4148 100V 200mA DO-35: Zener Diodes: Amazon.com: Industrial & Scientific
Zener Diodes Kit, 1W Power Diode Assorted Assortment Box Kit Set (3.3V/3.6V/3.9V/4.3V/4.7V/5.1V/5.6V/6.2V/6.8V/7.5V), Range 1N4728~1N4737,Pack of 200, By Ltvystore: Amazon.com: Industrial & Scientific