Hi,

If you dont mind spending a bit of money, there is a product made by the
company called Opto 22 called a solid state switch. 3-24 v dc in, controls up
to 240V ac at a selectable current rating ( device dependent). These are
triacs which have an opto coupler built in, so there is less contact noise
etc.

On the other hand, a nice automotive style relay with spade terminals and a
good old 2n2222 should work fine.

Regards
John

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