5177985-1 is a fine pitch SMT stacking connector receptacle designed for parallel board-to-board applications. This connector features a 0.8 mm pitch and is available in multiple position configurations ranging from 40 to 200 positions, with dimensions varying accordingly. The connector is offered with two plating options: 8 µm gold or 30 µm gold finish, and is supplied in tape and reel packaging format. It is designed to mate with complementary plug connectors and is commonly used in high-density interconnect applications where space constraints and reliable signal transmission are critical requirements.