Using the module to control a relay of your choice would give you control
of the isolation.

Note that many of the '5v-control to SPDT or DPDT mains contacts" relay
modules sold for use with eg Arduinos use relays which have impressive PCB
isolation distances between the coil contacts and two of the 3 terminals of
their SPDT switches BUT locate the centre contact adjacent to the coil
contacts.


Russell
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