Can anyone identify or confirm this is a 30v zener diode ?

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I bought these supposedly 30v zener diodes.could anyone confirm that they are as such?Never saw such notation.


PS.They are indeed...just measured them, but i couldn't find a 40v supply at hand before writing this topic..As i can't delete it anymore...
 

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I can't by looking at it, but you should be able to confirm it operates like one if you have a variable >30v DC power supply that you can vary the voltage output from and a multi meter to measure the voltage drop across it. Probably should put a limiting resistor in series with it to avoid shorting out your power supply.
 
It's clearly 30.0v not 33 at 1...3ma, but i wouldn't run them anyway at 5ma because of the temperature drift .They just look like precision ones.Now i have 14 of them and every each one sets in about 10 seconds at 29.9...30.1 v at 1...2ma after quick soldering the leads.I have all sorts of odd values, but these ones were the only ones i couldn't identify.
 
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