Electrical connector

An electrical connector for connecting with a cable, comprising:

• an insulating housing extending along a transversal direction and defining an opening at a rear side thereof, said insulating housing comprising a plurality of first passageways;
• a plurality of power contacts received in corresponding first passageways of the insulating housing, each power contact forming a first engaging portion and a first contacting portion;
• a power bus bar electrically and mechanically connecting with at least one power contact, said power bus bar having a main section, a middle section extending from said main section, and a connecting section extending from said middle section , said connecting section engaging with said first engaging portion of said at least one power contact;
• and
• a power contact spacer assembled within said opening of said insulating housing, said power contact spacer including a main body and a base extending downwards from the main body;
• wherein the main body of the power contact spacer provides a plurality of protrusions along the transversal direction, and wherein the insulating housing defines a plurality of grooves on a top wall thereof for correspondingly receiving the protrusions to thereby secure the power contact spacer on the insulating housing along a transversal direction.