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post #2 of Old 03-30-2012
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Re: Where can I get a 12V timer switch?

I don't see why not. Mind the current rating of course. When it comes to relays switching power DC is harder than AC but 12V is so much less than 120V that it should basically cancel. In-fact as a reference point the Bluesea switches I just put in my panel have this rating:

10A@250V AC, 15A@125V AC, 15A@12V DC

Note the 15A rating is the same for 125V AC as it is for 12V DC. That should roughly hold across other switches. The challenge with DC is that the voltage is constant whereas AC always crosses 0. If the switch arcs after breaking current the AC will extinguish when it crosses 0.
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