The 1-530745-1 is a military-qualified Mini-Box receptacle assembly for flow soldering, conforming to MIL-C-55302 specifications. This 128-position connector features a 0.050 inch [1.27 mm] centerline spacing and is constructed from liquid crystal polymer (GLCP-30F) housing material per MIL-M-24519. The contacts are made from beryllium copper per QQ-C-533 or ASTM B768, plated with a minimum of 0.000050 inch [0.00127 mm] gold in the mating area and 0.000100 inch [0.00254 mm] tin-lead in the terminating area over 0.000030 inch [0.00076 mm] nickel on the entire contact, meeting military specifications. The assembly has overall dimensions of 3.740 inches [95.00 mm] (dimension A), 3.450 inches [87.63 mm] (dimension B), and 3.150 inches [80.01 mm] (dimension C), with a maximum height of 0.255 inches [6.48 mm]. This connector is ideal for military and aerospace applications requiring sealed, high-reliability interconnections in harsh environments.