Lower profile card edge connector

A card edge connector, comprising:

• an insulative housing having a first wall and a second wall along a longitudinal direction and defining an insertion slot therebetween and a key within the insertion slot, the insertion slot located at a front of the insulative housing;
• a plurality of terminals arranged in a single row and assembled in the first wall from a front end of the insulative housing to a rear end thereof, and each terminal defining a contacting portion projecting into one side of the insertion slot;
• a pair of metal pieces located at the other side of the insertion slot;
• wherein the second wall does not have conductive terminals arranged.

The card edge connector for mounting to a printed circuit board and receiving a card edge module, comprising:

• an elongated insulative housing defining, along a lengthwise direction, a receiving slot between upper and lower side walls in a vertical direction perpendicular to said lengthwise direction;
• a plurality of terminals disposed in the housing with contacting sections exposed into the receiving slot around one of the upper and lower side walls;
• and
• a pair of metal pieces mounted at two opposite ends of the housing in said lengthwise direction, each of said metal pieces defining a mounting portion extending downwardly out of a seating face of the housing for mounting to the printed circuit board, and a resilient abutting portion extending into the receiving slot around the other of the upper and the lower side walls;
• wherein the terminals and the pair of pieces generate forces opposite to each other in the vertical direction for sandwiching the card edge module received in the receiving slot under condition that each of the metal pieces is dimensioned and configured to be thicker and stiffer than each of the terminals.