MK171 missing part

i have started to make the voice changer kit and it appears that i am missing the zenerdiode. can you please tell me which one i can use to replace it. the card just says 3v0 but i canty find that as a part.
many thanks

Hello @Neonec81

The Zener Diode is 3,3V 500mW
Our product code for this part is: ZA3V3 can be ordered via our local dealer.

Alternative compatible part: 1N5226B-TR 3v3 500mW through hole zener diode
Available by Mouser.
1N5226B-TR Vishay Semiconductors | Mouser Nederland

Best Regards,
Velleman support