The 102154-4 is a universal ejection pin header from TE Connectivity's AMP-LATCH product line, designed for ribbon cable interconnects with vertical orientation and standard profile configuration. It features 20 positions with a 2.54 x 2.54 mm centerline matrix spacing, preloaded square contacts with gold plating (30 µm gold flash over palladium nickel), and a 0.64 mm post size. The header is housed in a 4-sided black thermoplastic GF body with UL 94V-0 flammability rating, includes dual polarizing bar military-style mating alignment, and is compatible with wave solder processes up to 265°C. The termination post length is 2.79 mm with tin-lead over nickel plating, and it is recommended for use with 1.57 mm PCB thickness. This connector is ideal for applications requiring reliable, preloaded interconnections in industrial and military environments where robust mating alignment and ELV compliance are essential.