Electrical connector assembly having foolproof structure

An electrical connector comprising:

• an insulative housing defining a mating portion and a mating tongue;
• a plurality of second terminal retained in the insulative housing;
• and
• a shielding shell defining a mating frame surrounding the mating tongue and a mating cavity formed between the mating frame and the mating tongue, the mating frame defining a pair of long walls and a pair of short walls connected to each other and disposed oppositely;
• wherein each short wall defines a fool-proof slot running through the front edge of the mating frame, and the fool-proof slot is adjacent to one of the long walls and extends through the corresponding short wall in a transverse direction.

An electrical connector assembly comprising:

• an insulative housing defining a horizontal mating cavity commonly surrounded by opposite top and bottom walls and a pair of opposite side walls;
• a pair of fool-proof protrusions extending, in a transverse direction, outwardly opposite to each other on two opposite corners between one of said to and bottom walls said pair of opposite side walls and the corresponding side walls, respectively;
• a pair of deflectable latches disposed upon the corresponding side walls, respectively, with corresponding locking heads exposed to an exterior in the transverse direction;
• wherein
• each of said fool-proof protrusions is terminated behind a front edge of the housing in a front-to-back direction perpendicular to said transverse direction.