Patent ID: 8628347

Claim:
An electrical connector system comprising: a receptacle assembly comprising a receptacle housing having a mating end and a loading end, the receptacle housing having contact openings at the mating end, the receptacle housing receiving a plurality of contact modules through the loading end, each contact module comprising a plurality of receptacle signal contacts, the receptacle signal contacts having mating portions loaded into corresponding contact openings of the receptacle housing; and a header assembly comprising a header housing having a base wall and shroud walls extending from the base wall and defining a chamber, the chamber receives the receptacle assembly therein, the header housing holding a plurality of header signal contacts received in corresponding contact openings of the receptacle housing and mated to corresponding receptacle signal contacts, wherein the header housing has a top shroud wall, a bottom shroud wall, a first side and a second side at the mating end; wherein the receptacle housing and the header housing have horizontal alignment features and vertical alignment features for aligning the receptacle and header housings in a horizontal direction and in a vertical direction, respectively, the vertical alignment features being separate from the horizontal alignment features, the horizontal alignment features of the header housing comprising lugs extending along the top and bottom shroud walls, the lugs having angled lead-in surfaces angled to face forward and outward toward either the first side or the second side.