The 103309-3 is a low-profile vertical header connector from the AMPMODU .025 [0.64] Square Interconnection System, designed for reliable PCB-to-component connections with a 0.100 inch [2.54 mm] centerline spacing. This 16-position connector features dimension A of 1.100 inches [27.94 mm] and dimension B of 0.700 inches [17.78 mm], with post plating options available in Plating A and Plating B configurations. The connector utilizes a 0.100 inch [2.54 mm] contact spacing and 0.040 inch [1.02 mm] diameter contacts, with a contact area of 0.385 inches [9.78 mm] and 0.200 inches [5.08 mm] height. This header is commonly used in manual insertion applications for industrial electronics, telecommunications equipment, and computer peripherals where compact, reliable interconnection is required.