Patent ID: 8100711

Claim:
An electrical connector assembly, comprising a first substrate carrying a first plurality of electrical connections, the first plurality of electrical connections being defined by a first housing and at least one contact; a second substrate carrying a second plurality of electrical connections, the second plurality of electrical connections being defined by a second housing and at least one contact; a keying guide module positioned on the first substrate and a keying guide pin positioned on the second substrate; the keying guide pin having plural planar surfaces which are contiguous with each other defining a keying profile, where at least some of the planar and contiguous surfaces of the keying guide pin are substantially perpendicular with each other, and the keying guide module having a complementary receiving opening comprising complementary planar and contiguous receiving opening surfaces for receiving in keyed receipt, the keying guide pin, where at least some of the planar and contiguous surfaces of the keying guide module are substantially perpendicular with each other, and complement the at least some of the planar and contiguous surfaces of the keying guide pin, the keying guide module being oriented transverse to the first substrate along a first axis and having a height, as measured from the first substrate, higher than a height of the first housing, with the complementary receiving opening being elongate along the first axis.