5177983-4 is a fine pitch SMT stacking receptacle connector designed for parallel board-to-board applications. This connector features a 0.8mm pitch with 100 positions and 8µ" gold plating for reliable electrical contact. The connector has dimensions of A: 39.20mm (1.543"), B: 45.80mm (1.803"), and C: 44.20mm (1.740"). It supports various stacking heights ranging from 5mm to 8mm when paired with compatible plug connectors. This receptacle is ideal for high-density interconnect applications in electronics where space-saving and reliable board-to-board connections are required.