[morzh]

For instance in my 37-116 110pF caps are in the circuits where the voltage will be on the order of units of volts or maybe 10-30 volts max if even that.

So 100V rating would do.

However when going to Mouse and looking at the prices I did not notice significant difference between a 100V cap and 500V cap. What makes the difference is toleranc - 1% cap costs a buck more than 2% cap. So, this considered, might as well buy more 500V caps and use them across the board without much thinking.