5177983-6 is a 0.8mm fine pitch SMT stacking receptacle connector designed for parallel board-to-board applications. This 140-position connector features 8µ" gold plating for reliable electrical contact and is part of the Free Height (FH) connector series. The connector has dimensions of A: 55.20mm (2.173"), B: 61.80mm (2.433"), and C: 60.20mm (2.370"), and supports various stacking heights ranging from 5mm to 8mm when paired with compatible plug connectors. This RoHS compliant connector is ideal for high-density interconnect applications in electronics where space-saving parallel board stacking is required.