Hi, i have a glass diode, there are 3 rings
first : blue (i think is zener)
second : purple
third : purple.
I try to search on the web, but no information, just resistor code (1N677, but in motorola datasheet, it’s not zener, but rectifier)
any help appreciate.
Seb
Hello @rep-levis
Welcome to community!
Please attach the image of the part so that we can better understand and provide a solution.
Hello @rep-levis
I was not able to find a diode using the information you have provide us, if you could include a photo of the part, we might be able to identify this part.
I am not able to find the value your color bands indicate.
Hi, you can see, blue, purple, purple.
I found a link for diode color code decoding chart. If we go by that in link Diode Identification - Diodes - Basics Electronics to view the numbers the blue purple purple represent it would be 677 and by that 1N677 being the diode number. However we don’t have one like this in stock as seen here: https://www.digikey.com/en/products/filter/diodes/rectifiers/single-diodes/280?s=N4IgTCBcDaIIwDkBsB2FIC6BfIA
Sorry for the inconvenience.
I think it’s not good part number, because 1n677 it’s not zener diode. Or I see on web, first ring blue, is zener diode.
The only other diode color code calculator I found is on the Vishay diodes specifically:
RepairCompanion - Diode Color Markings
That suggests that zeners start with blue but it does not change the end result according to the color code table found on the same page. Also, there is no standard marking for zeners, it seems each manufacturer may code them differently. Sorry for the inconvenience.
If you would like to browse some through hole zener diodes we carry the link is here.
