Contact arrangement for use with high speed transmission

A card edge connector for connecting a module which provides high speed transmission, comprising:

• an elongated insulative housing defining a central slot extending along a lengthwise direction of the housing;
• two rows of passageways provided at two sides of the central slot;
• a plurality of contacts received within corresponding passageways, each of said contacts including a base secured in the corresponding passageway, a main arm extending upwardly from the base toward and into the central slot, an auxiliary arm extending upwardly, independently and separately with regard to the main arm, from the base between an outer wall of the housing and the main arm, a portion of the main arm other than the base being contactable with the auxiliary arm and thereby providing parallel electrical paths for transmitting signals from the module to the base when the module is fully received in the central slot;
• wherein the auxiliary arm and the main arm are substantially the same size, and the auxiliary arm is spaced from not only the main arm but also the outer wall, the auxiliary arm is spaced from the main arm when the module is not received within the central slot, but is engaged with the main arm and deflected toward the outer wall when the module is fully received within the central slot and the main arm is deflected toward the auxiliary arm;
• and
• the connector further includes a central rib under the central slot so that each of said passageways is defined between the central rib and the outer wall.