Phoenix Contact Material Change to Housing for "FRONT 4" Terminal Blocks Phoenix Contact is changing the housing material to PA 6.6, for the products mentioned below. This will improve the inflammability class from V2 to V0. All further dimensions and technical data will remain the same. During transition of the changes listed above, Mouser may supply both products simultaneously depending on inventory. Part Numbers Affected 651-1703050 1703050 651-1703063 1703063 Please contact a Mouser Technical Sales Representative for further information. 5-0713-43