5102156-4 is an AMPMODU interconnection system header designed for reliable board-to-board connections. This connector features a 0.100 inch (2.54 mm) centerline spacing and utilizes 0.025 inch (0.64 mm) square post contacts. The header is part of the AMPMODU family of headers and receptacles, offering various plating options including gold and tin over nickel underplating. It is suitable for applications requiring compact, high-density interconnections in electronic assemblies.