Right-Angle DB-9 for Board-Edge Signal I/O
The 5745781-3: Each phosphor bronze contact carries gold flash plating — enough for routine mating cycles in a signal application, though the flash thickness (not a heavy gold plate) means this receptacle is best suited for connections that mate a few dozen times over the equipment life rather than a field-service port cycled daily. The 6 A per-contact rating and 125 V working voltage align with standard DB-9 signal duty: RS-232, serial, instrumentation links, and control lines where the total current per pin stays under the derating curve. The steel shell with tin plating and the integral ground strap provide the EMI containment and shield termination expected of a D-Sub in an industrial or telecom enclosure. The housing/shell flange accepts 4-40 jackscrews for a positive mechanical lock to the mating plug — critical in high-vibration environments where the connector pair must not separate under cable strain.
9-Position Layout and PCB Fit
The 9 positions are arranged in two rows in the standard DE (E) shell size — the smallest D-Sub footprint, which keeps the board real estate tight. Compared to the 9-position bulk-packaged sibling 8-1437045-3, the 5745781-3 ships in a tray — the same connector electrically, but the tray packaging suits automated pick-and-place lines that feed from a standard tray stack, while bulk packs are more common for hand-load or low-volume rework. For a BOM line, the choice between tray and bulk is a line-feeding decision, not a functional one.
The solder termination requires the PCB to be pre-drilled with the right-angle footprint — the through-hole tails are 0.040" diameter, typical for a DB-9 solder tail. No crimp tool or die is needed; the contacts are not removable, so the termination is one-shot per board assembly.