Front Dimension : 9x9mm , 9x14mm , 9mm dia.[Flush Mounting : 19x19mm , 19mm dia.]Mounting Hole Size : 8mm dia.[Flush Mounting : 16mm dia. , 15.8x15.8mm]Switching Rating : 100§Å / 10§Ë to 42V / 100mAFront Protection : IP401 snap-action switching element.