There are better breakout boards:
http://www.ebay.com/itm/ACS712-current-sensor-module-5A-range-/160730888420
Your board will work with 100V, and the risk is very low with 100V. But if it is about safety, I would say: Do it well, or don't do it at all.
Sparkfun parts are available from Sparkfun but also from other sellers in many countries.