The 5188835-1 is a Z-PACK 2mm Hard Metric (HM) receptacle connector designed for vertical board-to-board mounting. It features a Type B, 22-column layout with a total of 154 positions, including 110 signal contacts across rows A, B, C, D, F, Z, and E. The phosphor bronze pin contacts have 30µin gold plating in the mating area and a short tail style with a 3.71 mm feedthrough post length. Housed in gray, UL 94V-0 rated polyester, this unshielded connector is designed for CompactPCI P2/P5 applications, offering a robust solution for backplane systems.