745189-7 is an HD-20 AMPLIMITE subminiature D connector receptacle designed for PCB mounting applications. This straight posted connector features 37 contact positions in a shell size 4 configuration, with phosphor bronze contacts that include gold plating on the mating end and tin on the termination end with nickel underplating. The connector offers dimensions of approximately 2.729 inches (69.32 mm) for dimension A and 2.500 inches (63.50 mm) for dimension B, with post lengths available for various PCB thicknesses. All receptacles are preloaded with size 20 DF posted socket contacts, making them suitable for reliable signal interconnection in electronic equipment and instrumentation applications.