9-Position DE-9 Plug with Grounding Indents and 4-40 Screwlocks
The TE Connectivity 1-747871-4 is a 9-position, 2-row D-sub plug from the AMPLIMITE HD-20 series, configured as a male pin connector with a DE-9 shell size. It is designed for through-hole solder termination to a PCB, with gold-plated brass signal contacts rated at 6A per circuit and 125V. The black UL94 V-0 thermoplastic housing carries grounding indents on the shell and a mating-side female screwlock (4-40) on the flange, giving this plug the shield continuity and mechanical retention needed for a cable-to-board or panel-mount interconnect that sees field service.
125V / 6A Rating and Operating Range
Rated 6A per contact at 125V, this plug carries the standard signal-level current for a DE-9 layout — the 6A figure is per-circuit, not total, so a fully populated 9-position connector can handle up to 54A summed across all circuits, though the practical limit is set by the derating curve and the bundled cable temperature.
Gold Contacts and Grounding Indents
Gold plating on the brass contacts gives this plug the mating cycle life for field-serviceable connections — a tin-plated contact would fret after a few dozen mates, but the gold surface handles repeated insertions without oxidation. The 4-40 female screwlocks on the mating side secure the pair against vibration and cable strain, common in rack-mount and panel-mount installations.
Mates with any standard DE-9 (shell size 1) D-sub receptacle with male screwlocks — the 4-40 female thread on the flange accepts the jack-screws from the receptacle side. Termination is through-hole solder to a PCB; the 2-row 0.108-inch (2.74 mm) row spacing and 0.090-inch (2.29 mm) contact spacing are the standard DE-9 footprint. The plug accepts 20-28 AWG wire if used with a solder-cup variant, but this specific order code is a PCB-mount solder-tail version.