Diodes
Diodes
(OP)
In an effort to resolve a difference of opinnion could someone difinitively validate clarify the correct purpose for a diode being placed across a relay or soleniod coil.
Is it there to protect the coil from damage of the collapsing field;
Or is it there to protect circuit boards from the backward EMF of the collapsing field
Just a friendly disputed point of view here.
Is it there to protect the coil from damage of the collapsing field;
Or is it there to protect circuit boards from the backward EMF of the collapsing field
Just a friendly disputed point of view here.





RE: Diodes
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Diodes
RE: Diodes
2) ...protect circuit boards...
2
RE: Diodes
In some applications one aspect may be more important than the other. Many coils will withstand the back EMF, some won't.
In some applications the diode may introduce a time delay on drop out.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Diodes
RE: Diodes
Keith Cress
kcress - http://www.flaminsystems.com