3-5177986-3 is an 80-position fine pitch SMT vertical plug connector designed for parallel board-to-board stacking applications. It features a 0.8mm contact pitch with 8µ" gold plating on the contact area and is supplied in tape and reel packaging for automated assembly. The connector has dimensions of A: 31.20mm (1.228"), B: 37.80mm (1.488"), and C: 36.20mm (1.425"), with brass contacts that are duplex plated including nickel underplating. This connector is part of the 0.8mm Free Height (FH) connector series and supports various stacking heights when paired with compatible receptacles, making it ideal for compact electronic assemblies requiring reliable board-to-board interconnections.