The 745189-1 is an AMPLIMITE HD-20 subminiature D-type receptacle connector designed for high-density interconnect applications. This full metal-shell straight posted connector accommodates 37 contact positions and features a steel shell with tin plating and a 94V-0 rated thermoplastic black insert. The connector has a mating face dimension of 0.429 ± 0.015 inches (10.90 ± 0.38 mm), with socket contacts made from phosphor bronze and available in two plating options: gold on mating end with tin-lead termination, or gold flash on mating end with tin-lead termination, both with minimum 0.000050 inch (0.00127 mm) nickel underplating. The posted design includes square posts with lengths of 0.125 inches (3.18 mm) for PCB thickness of 0.062–0.093 inches or 0.188 inches (4.78 mm) for PCB thickness of 0.093–0.125 inches, and clinch nuts are available for secure mounting. This connector is ideal for applications requiring reliable, compact interconnections in instrumentation, data acquisition, and industrial control systems.