Miniature electrical connector having power pair on side surface of a tongue of a housing thereof

An electrical connector comprising:

• an insulative housing having a mating face, a pair of sidewalls, an upper wall between the pair of sidewalls thus together forming a receiving space, a rear base opposite to the mating face, and a mating tongue integrally extending forwardly from the rear base and beyond the mating face, the mating tongue defining a plurality of receiving channels in a vertical direction and a pair of groove in each side surface of the mating tongue;
• and
• a plurality of contacts composed of a plurality of signal contacts and a pair of power contacts, each contact having a mating portion, the mating portion of each of the signal contacts being retained in a corresponding receiving channel, the mating portion of each of the power contacts being retained in a corresponding groove of the mating tongue.