An electrical connector includes an insulative housing, a contact module, and a magnetic module. The insulative housing defines a receiving cavity forwardly communicating with an exterior plug and a mounting cavity located behind the receiving cavity. The contact module includes a set of mating contacts each having a contacting portion exposed within the receiving cavity and a set of mounting contacts for connecting to an exterior substrate. The magnetic module is received in the mounting cavity and electrically connecting the mating contacts to corresponding mounting contacts. The magnetic module includes a printed circuit board (PCB) and four isolated transformers surface mounted on a same face thereof. The four discrete transformers are arranged on a limited space of the PCB.