> 3) the contacts area seems not so large, especially the NC
> contacts
> (but I will use two in parallel)
No matter what the relay, the actual contact area that
touches is very small. The big area gets rid of heat
however.
> 4) when the coil is energized, the moving contact press
> the NO fixed
> contact using only its elastic force (not pressed by the
> armature)
This has to be. Otherwise coil voltage would affect contact
pressure. That would be a poor design. Relays always have
some sort of spring or spring action that controlls contact
pressure. It is often designed so the contact rubs a small
amount when closing and opening.
> 5) when the coil is not energized, the moving contact
> press the NC
> fixed contact using the elastic force of the armature (it
> is pressed
> by the released armature)
Good design. This makes pressure equal and controlled by the
contact support which doubles as a spring.
I see the pictures now at the link. The relay you have is
similar inside to relays that are very effective for RF. I
normally just use SPDT because the contact connection path
is larger. That is where most of the RF heating will be.
73 tom
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