You need X or Y rated caps made for use across the AC line. See link to the Vishay Data sheet on suppression capacitors
http://www.vishay.com/docs/28119/mkp3382.pdfA manufacturer specific search for "Vishay suppression capacitors" placed in the Keyword search window
on the Digi-Key website will bring up 4 pages of Vishay X and Y rated suppression capacitors.
Scotty