146134-4 is a double-row vertical surface-mount header connector part of the AMPMODU 0.025 inch square interconnection system. It features 0.100 inch [2.54 mm] centerline spacing with 0.025 inch [0.64 mm] square posts and is available in multiple position configurations ranging from 4 to 30 positions. The connector is designed for board-to-board applications with two different mated height options: 0.230 inch [5.84 mm] and 0.320 inch [8.13 mm], accommodating various PCB stack-up requirements. The product is RoHS compliant and available in multiple contact plating options (Plating A and Plating B), making it suitable for diverse industrial and commercial interconnection applications requiring reliable vertical stacking and high-density board connections.