The 5-5179009-1 is a 40-way 2-row 0.8mm SMT FH Stacking Receptacle, 12mm stack height, beryllium copper alloy contacts with gold plating, LCP housing. Tyco Electronics 0.8mm FH surface-mount connector is designed for parallel board stacking applications using subminiature connectors to meet today's electronic industry requirements for high density packaging. It is possible to save more than 50% of the required board space when compared to conventional 1.27mm (0.050-inch) centreline connectors. 0.8mm FH connectors are ideally suited for application downsizing, such as notebook PCs, pen pads, cellular telephones and other electronic equipment requiring miniature connector packaging. The receptacles are preloaded with the Tyco Electronics unique bellows-type spring contacts for reliable electrical connection with the plugs. In addition, right angle plugs are available which mate to standard receptacles.