5177983-1 is a fine pitch SMT stacking receptacle connector designed for parallel board-to-board applications. It features a 0.8mm contact pitch with 40 positions and 8µ" gold plating for reliable electrical connections. The connector has dimensions of A: 15.20mm [.598"], B: 21.80mm [.858"], and C: 20.20mm [.795"], with a height of 3.8mm [.150"]. It supports various stacking heights ranging from 5mm to 8mm when mated with compatible plugs. This receptacle is ideal for compact electronic assemblies requiring reliable parallel board-to-board interconnections in space-constrained applications.