Latching SSR

[meenogre]

My SSR is rated:
Input 105-130 VAC 3VA, Contacts 125VAC 1/3Hp
I know that very little current is required to operate it, and they do trickle some current through closed contacts.
What are the chances that (OK, I mean parameters that will cause) a closed contact will leak enough current to energize itself?

 

[nbucska]

There is an optocoupler between input and output -- the leakage is due to the plastic case.

If you want latching add transistor or IC latch.

<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032

 

[Mike2468]

Your application is to a 1/3 hp inductive load. Any minor leakage current should be absorbed by that load. You are ok.

If you are concerned, you can always add a small burden resistor on the latch. OR buy a solid state relay that already has the AC input circuit designed that it does not need a burden resistor.

 

[nbucska]

Leakageis practically zero -- it can't latch.

<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032