Curve tracer christmas calendar 14 – Zener diode Today is a interesting, old 5V Zener diode from the early 60s. Its in a metal capsula and made by Intermetall. Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading... Author: Thomas S. Knutsen Electronics engineer with interests in RF and analog electronics. View all posts by Thomas S. Knutsen