5353999-4 is a fine-pitch SMT stacking connector designed for parallel board-to-board applications. This connector features 100 contact positions and is available with either 8 microinches or 30 microinches of gold plating to suit various reliability and environmental requirements. The connector has dimensional specifications of 39.20 mm (A), 45.80 mm (B), and 44.20 mm (C), providing a compact form factor suitable for high-density interconnect applications. The product is supplied in tape and reel packaging format, enabling efficient automated assembly processes. These connectors are commonly used in telecommunications, computing, and industrial equipment where reliable board-to-board signal and power distribution is essential.