1-5316318-0 is a 0.6mm pitch fine pitch SMT stacking connector receptacle designed for parallel board-to-board applications with a 12H (12mm) stacking height configuration. The receptacle features 140 signal positions and is constructed with high-temperature thermoplastic housing rated 94V-0, with copper alloy contacts duplex plated with gold on contact areas and nickel underplating for durability. It operates at a voltage rating of 50 VAC with a current rating of 0.5 ampere, overall contact resistance less than 30 milliohms, and dielectric withstanding voltage of 0.2 kVAC across an operating temperature range of -40°C to +85°C. The connector dimensions are 41.4mm (A), 44.0mm (B), 48.7mm (C), 44.6mm (D), and 11.25mm (E) height, making it suitable for compact high-density interconnect applications in telecommunications, computing, and industrial equipment requiring reliable stacked board connections.