How to Test A Zener Diode

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With respect to the usage, installation or assembly of any products described in this video, Galco Industrial Electronics, Inc., a Michigan corporation, encourages you to follow the requirements and/or guidelines of: i) the Occupational Safety and Health Act of 1970, Public Law 91-596, as amended, and all laws, rules and regulations implemented in relation thereto; ii) the National Electric Code®; and iii) NFPA 70E®. Any installation, assembly or work described in this video should be performed by a qualified licensed electrician.

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[charlesbrasil]

This is the best video about this subject that I have ever seen. Thank you !

[johnruscigno]

Where did you find that zener diode? I've never seen black one's before. They looked more robust than the tiny red one's.

[vader]

how do you know which type of zener diode to search for data? Is it by reading the number on the diode body?

[j]

yeah its all well and good when its your own diode and not one you randomly pulled from a circute

[LS]

I have a switching power supply. The voltage swing is around 1 Hz. Zener replacement solved this problem. But the faulty zener passed the multimeter test and the voltage limiting on the dc load. So how to test zener for high speed operation?

[danfuerthgillis]

We'll checked the voltage on the zener and getting 3.2 volts using a 1K ohm resistor and a 9v battery. It's a 751 Zener as marked on it so I believe it needs to be replaced. almost done fixing the Memory Man deluxe!!

[mrcesporinas]

bro my indcution heater metal melter is 3500watts and input v is 48v what is the correct zener diode need to use it?

[donaldfilbert]

Would this also work testing the reverse breakdown of a Schottky diode? When I tried it - I got no current - even for 10 volts over the Schottky breakdown voltage (Schottky Vr = 20 V. tested reverse voltage = 30 VDC). The full voltage drop read across the Schottky (30 VDC) - and NO voltage read across the resistor (which was only 10 ohms). Am I missing something ??

[AJ-pgqe]

isa kanang activity sa elecs, mabuhay ka

[brutusjb]

WHat if you get continuity across the diode to +/-

[gordthor]

What about the orange glass zener diodes? I have one shorted in an expensive preamp that never had a schematic. Is there any method of determining it's value to replace it?

[jimc]

Maybe I am mistaken, but isn't that diode's cathode pointing to the positive terminal of the battery? I thought diodes are forward biased in order to read voltage. That would means the diode has to be reversed in the diagram.

[stevetobias]

OL means "Outside Limits" not "Over Load".
Great video however, great information.

[SteverRob]

Iirc "OL" means "open loop"

[Technicaldmk]

Sir it's not a zener it's a 4005 simple diode😊

[FormulaPontiac]

I has always thought that OL mean Over Limit.

[danfuerthgillis]

Great Simple video. I have a Zener Diode here that measures 1.82 v on the reverse diode test I believe this diode is shot anyone can anyone help? as I think I may have to order some...

[APt]

Why resister is used to measure zener diode...

[echothehusky]

Very helpful, thank you. Also I'm like #666!

[AviJoncic]

This is schottky diode bro, not zener!!!!