Patent ID: 8337254

Claim:
An electrical connector assembly comprising: an electrical receptacle having an insulative housing defining a columnar first mating cavity with a circular mating post exposed therein and extending along a rear-to-front direction, and a rectangular second mating cavity in communication with the first mating cavity but located at a lateral side of periphery of the first mating cavity, a plurality of power terminals received in the first mating cavity and a plurality of signal terminals received in the second mating cavity; and an electrical plug connector comprising a first mating portion and a second mating portion respectively filling the first mating cavity and the second mating cavity at the same time when mated with the electrical receptacle; wherein the first mating portion is of a columnar body and the second mating portion is of a rectangular body on a lateral side of a periphery of the columnar body in a radial direction; wherein a metallic shell encloses the first mating portion and has an opening along a side therein for allowing the second mating portion to extend therethrough; and wherein the second mating portion defines a pair of passageways at opposite sides thereof for respectively receiving a signal terminal therein.