I'm pretty new here. Usually just a reader. Looking for help on the marking voltage stabilizer. Zte1.5. I work in the semiconductor industry and a customer says the cathode band should be on the positive side but I disagree. It can be used in reverse bias but I don't see anywhere that says it should be marked in reverse. Any thoughts?

 

Hi Con,
Welcome to AAC,
This is what Google states.

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AI Overview
The end of a ZTE1.5 voltage stabilizer diode marked with the cathode ring must be connected to the negative pole of the supply voltage.

Polarity Details for ZTE Diodes

• • ZTE1.5 and ZTE2: The banded end (cathode ring) connects to the negative pole.
  • ZTE2.4 through ZTE5.1: The banded end connects to the positive pole.

 

According to the datasheet for ZTE1.5 and ZTE2 the cathode has to be connected to GND, for all other types to the positive side

 

On axial foil wrapped and unmarked capacitors the outer foil side goes to ground. After testing to determine the foil side end, I mark the foil side end.