Estimating VAC rating from VDC rating
You can not estimate an AC rating from a DC rating, a DC rating from and AC rating or estimate any other &quot;rating.&quot; The rating is what is published by the manufacturer. What you are asking for is an estimate of the risk involved with using a component outside of its rating. It is really a bad idea to leave anything unattended if you are not certain that is will be operated within its ratings. It is probably not a good idea to operate anything above 50 volts if that is outside its rating. The risk also goes up with increased current. You are always on your own when you take the risk of using something outside of its rating.