An electrical connector includes an insulative housing having a mating cavity, a tongue portion extending into the mating cavity and defining thereon first and second faces opposite to each other, and a plurality of contacts retained to the housing. The plurality of contacts defines a first and second set of contacts and expanded contacts. The first set of contacts each defines a first blade contacting section exposed onto the first face, the second set of contacts each defines a deflectable cantilevered beam exposed onto the second face, and the expanded contacts include at least one power contact for power transmission. The at least one power contact defines a second contacting section arranged between two adjacent cantilevered beams and projecting out of the second face.