A quick Google shows some promising results: [1] Page on Industrial programmable "Limit alarm trips and switches" [2] General Electric "MicroVersaTrip"/"microEntelliGuard" programmable voltage/current sensing circuit breakers (GEH-6273). Feature configurable under-voltage and over-voltage protection. Check out the user manual [1] http://www.miinet.com/ProductInformation/MainProductSelectionIndex/LimitAla= rmTripsandSwitches.aspx [2] http://apps.geindustrial.com/publibrary/checkout/GEH-6273E?TNR=3DInstallati= on%20and%20Instruction|GEH-6273E|generic On Wed, Nov 11, 2015 at 8:39 PM, Jason White < whitewaterssoftwareinfo@gmail.com> wrote: > Is a relay closure/opening fast enough for your application? (Say 25 > milliseconds or so...) Or do you require solid state switching? > I suspect there are quite few common controls/modules from the industrial > automation world (where relay outputs are common) that could do it. > > On Wed, Nov 11, 2015 at 3:30 PM, Dwayne Reid > wrote: > >> Good day to all. >> >> A client has asked if we can supply them with an over-voltage protect >> module for them to include in their (very) expensive computer system. >> >> This seems like a reasonable precaution for them to take - I >> personally have had at least two computer motherboards destroyed by >> power supplies that failed and ran very high output voltage. >> >> I'm looking for something off the shelf if possible. I'm thinking >> that it should be sufficient to monitor and protect only the +12V + >> +5V rails, which means the module could simply plug into one of the >> 4-pin molex power connectors. >> >> Has anyone run across anything like this? >> >> I'll build them if need be but it's hard to justify the cost when >> they want only two or three of these units. >> >> Many thanks! >> >> dwayne >> >> -- >> Dwayne Reid >> Trinity Electronics Systems Ltd Edmonton, AB, CANADA >> (780) 489-3199 voice (780) 487-6397 fax >> www.trinity-electronics.com >> Custom Electronics Design and Manufacturing >> >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > > > -- > Jason White > --=20 Jason White --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .