These switches are used whenever electrical components should be switched delayed in a simple and particular way. Typical applications are time-delayed turnoffs of fans ventilating bathrooms or ovens to remove water condensation.


If control voltage is applied to the control leads, the working contact closes with a time-delayed feature.
This contact system is galvanically isolated from the control leads.
After removing control voltage the contact keeps closed for another delayed time which depends on the surrounding temperature and that the time control voltage was present.

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