SMD ZF 3,6: Chip Zener diode 0.5 W 3.6 V at reichelt elektronik
Zener Diodes 3.6 Volt 0.5W 2%: 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