Electronics > Projects, Designs, and Technical Stuff
How to choose TVS diodes to dispel flyback surges from relay coils?
<< < (5/7) > >>
NiHaoMike:

--- Quote from: calzap on February 08, 2020, 07:36:44 am ---I know essentially nothing about practical use of opto-coupled triacs.   I'll have to educate myself.  Thanks for the suggestion.

--- End quote ---
Those are better known as SSRs.
calzap:

--- Quote from: NiHaoMike on February 08, 2020, 01:35:22 pm ---
--- Quote from: calzap on February 08, 2020, 07:36:44 am ---I know essentially nothing about practical use of opto-coupled triacs.   I'll have to educate myself.  Thanks for the suggestion.

--- End quote ---
Those are better known as SSRs.

--- End quote ---
OK.  I was sleepy and should have realized that.  :=\   Those I've used before.
DBecker:

--- Quote from: NiHaoMike on February 08, 2020, 01:35:22 pm ---
--- Quote from: calzap on February 08, 2020, 07:36:44 am ---I know essentially nothing about practical use of opto-coupled triacs.   I'll have to educate myself.  Thanks for the suggestion.

--- End quote ---
Those are better known as SSRs.

--- End quote ---

'SSR' usually refers to an assembly that includes an opto-isolated triac triggering a power triac, along with a handful of other components (input resistor, noise filtering, snubber).

ffrige:
@calzap: just curious, did you end up putting those TVS diodes parallel to the load or parallel to the switch? I wonder if the second option is better, because it keeps the voltage across the switch lower. Thanks!
wraper:

--- Quote from: jonpaul on February 05, 2020, 07:01:45 pm ---Use ordinary diode, 1N4004 for small relays, not a transient absorbing Zener

Jon

--- End quote ---
Using regular diode has a huge downside. Relay turns off much slower, thus you will get way more contact arcing/ wear. https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=13C3311_AppNote&DocType=CS&DocLang=EN

Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod