The TE Connectivity AMPLIMITE HD-20 747845-4 is a 15-position D-Sub receptacle with female sockets, arranged in two rows. It uses the standard DA shell size (2) with 4-40 threaded inserts for mating hardware. The 6A per-contact current rating at 125V is typical for signal and low-power circuits in this shell size — think RS-232, parallel data, or control lines inside industrial controllers, test equipment, or medical devices. The board lock and ground strap add mechanical retention during soldering and a low-impedance path to the PCB ground plane for EMI control.
The 6A per-contact rating is the current each pin can carry continuously at room temperature. This is standard for D-Sub signal applications; for higher-voltage circuits, the creepage distance between pins in the DA shell layout becomes the limiting factor, not the connector itself. The UL94 V-0 rated thermoplastic housing means the connector can be used inside equipment enclosures where flame retardance is required by safety standards. The steel shell with tin plating provides RFI/EMI shielding when mated to a matching D-Sub plug with a metal backshell.
The 4-40 threaded inserts accept jackscrews on the mating plug for secure, vibration-resistant connection. Termination is through-hole solder — the right-angle pins insert into the PCB and are wave-soldered. The 0.318" (8.08mm) backset spacing means the mounting flange sits that distance from the PCB edge, which matters for panel cutout alignment in standard D-Sub openings.