DC relay for 48V Power Vent [RE-wrenches]

[Windy Dankoff]

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John,

I agree with Christoper. I also add that mechanical switch contacts  
rated at X Vac will have about the same arc potential (equivalent amp  
rating) at 1/2X VDC. Therefore, a common 125VAC (contacts rating)  
relay should work fine at the normal range of 48V system, especially  
with oversized contacts.

To confirm this, look at relay specs. They usually do show DC voltage  
ratings being about half that of their AC ratings. In that case, you  
are really covered.

Windy


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