# How to decipher zener diode encoding?

I'm new to electronics and I'm trying to reverse engineer the circuit board in an R/C car. I've come across a diode and it is labelled...

C3V3
5T


1) I assume 3V3 means 3.3V, but what do the C and 5T mean?

2) Is the black stripe on the input or output side?

3) Is there a dead giveaway letting me know this is a "zener" diode? I ask because I've been web searching and all results turn up as a zener diode.

• A close-up photo of the board would be good. – gwideman Apr 17 '14 at 22:55
• I cannot attach photos, I don't have a high enough rating... However, this is strictly a diode we are talking about. – Zak Apr 17 '14 at 23:31
• The appearance of the diode, the typeface used, possible confusion over characters and possibly even the surrounding components, would give a clue as to what this is. For example, "5T" could actually be "ST", a manufacturer of diodes. – gwideman Apr 17 '14 at 23:34
• Maybe you could post a photo to somewhere you do have access to? – gwideman Apr 17 '14 at 23:35
• @gwideman It very well could be ST in a block style font. Also, I've been looking for photos and I can't find one to save my life. – Zak Apr 17 '14 at 23:37