The 3-6318491-6 is a 220-way 2-row 0.5mm SMT FH Stacking Plug, 8mm stack height, copper alloy contacts with gold plating, high temperature thermoplastic housing and black colour. 0.5mm free height is a two-piece connector system designed for parallel board-to-board stacking applications. The contact system is identical to our popular 0.6mm FH product. The 0.5mm FH product has been chosen by the PICMG COM Express working group as the interface between embedded modules and carrier cards.