254590-E is a vertical male SMC connector designed for board-to-board interconnection in compact electronic systems. This 40-pin dual-row connector features a 1.75 mm unmated stacking height and surface mount technology (SMT) termination, enabling automated board assembly. The connector operates at data rates up to 3 Gbit/s with a 1.27 mm grid pitch, providing high signal integrity and secure mating with double-sided spring contacts. Key dimensional specifications include an overall length (A) of 28.55 mm and width (B) of 30.48 mm. The black insulation body with location pegs ensures fast visual recognition and exact board placement. This connector is ideal for applications requiring limited board space, high performance, and reliable signal transmission in modern electronic systems.