Straddle card edge connector

A card edge connector, comprising:

• an elongated housing having a top wall and a bottom wall opposed to the top wall, the top wall having a first mounting surface at a rear end thereof, and the bottom wall having a second mounting surface at a rear end thereof;
• and
• a plurality of contacts retained in the housing, the contacts comprising a plurality of first contacts arranged in an upper row and a plurality of second contacts arranged in a lower row parallel to the upper row, each first contact having a first retaining portion retained in the top wall and horizontally extending to the first mounting surface, a first contact portion forwardly extending from a front end of the first retaining portion and a first connecting portion extending from a rear end of the first retaining portion, each second contact having a second retaining portion retained in the bottom wall and horizontally extending to the second mounting surface, a second contact portion forwardly extending from a front end of the second retaining portion and a second connecting portion extending from a rear end of the second retaining portion, the first contact portions and the second contact portions defining a first receiving space therebetween to receive a module, the first connecting portions and the second connecting portion defining a second receiving space therebetween to receive a mother board;
• wherein the bottom wall is longer than the top wall along an insertion direction of the module to make the second mounting surface is located at a rear side of the first mounting surface.

A card edge connector assembly comprising:

• an insulative housing extending in a longitudinal direction with a center slot, in a front face, extending along said longitudinal direction for therein receiving a module which is adapted to be inserted into the center slot in a front-to-back direction perpendicular to said longitudinal direction, said center slot dividing the housing into two opposite longitudinal side walls;
• two rows of contacts disposed in the housing and located by two sides of the center slot, respectively, each of said contacts defining a front contact portion, and middle retaining section and a rear surface mounting connecting portion under condition that the connecting portions of the contacts of said two rows are arranged for commonly straddling upon two opposite surfaces of a printed circuit board which is adapted to be mounted to a rear face of the housing;
• wherein
• the gap defined between the connecting portions of the contacts of two rows is offset from the center slot in a transverse direction perpendicular to both said front-to-back direction and said longitudinal direction to be closer to one of said longitudinal side walls than the other under condition that one row of the contacts disclosed in said one of the longitudinal side walls define the corresponding middle retaining sections at a position in front of the corresponding middle retaining sections of the contacts of the other row.