What this is and where it sits in the Delta D series
The Delta D D3W3P36A6GX08LF is a D-Sub Combo plug in the size-2 (DA, A) shell with a 3W3 contact arrangement — three dedicated power positions, not a signal-density layout. Right-angle through-hole mount, male pins, black UL94 V-0 housing, steel shell nickel-plated. The 3W3 designation marks this as a power-specific D-Sub variant within the Delta D family, distinct from standard signal-density layouts that use the same shell size but route smaller contacts at tighter spacing. The two features that govern fit on the board are the 0.374-inch (9.50 mm) backset — the distance from the mounting face to the contact shoulder — and the board-lock tabs on the housing flanks. The board lock takes shear load off the solder joints under vibration or thermal cycling, which matters for any industrial enclosure. Grounding indents on the shell mate with the connector face to bleed shield current before it reaches the pins, protecting adjacent signal circuits.
What the ratings mean for the design
Rated 30 A per contact at 300 V — that current figure is per contact, not a shared bus rating, which matters when the harness routes three parallel power paths. For a 3-position combo plug carrying a single 3-pin power feed, each contact carries its own 30 A allocation; derate above 125 °C operating temperature per the product drawing. The voltage ceiling of 300 V is the dielectric withstanding rating for this shell size and contact spacing, not a signal-integrity limit. Contact plating is 30 µin (0.76 µm) gold over brass. The thickness is the meaningful spec — at 30 µin the gold layer resists fretting wear across the expected mating cycle life of a power connector better than thin gold-flash or tin-only grades. Brass base gives the spring properties the D-Sub contact geometry needs; the nickel underplate provides a diffusion barrier so the gold stays on surface rather than migrating into the brass over thermal excursions.
How it compares to the GL variant
The D3W3P36A6GL08LF shares every electrical and mechanical spec with this part — same 3 power positions, same 30 A at 300 V, same 30 µin gold, same right-angle through-hole footprint, same shell size 2 (DA, A). The delta is in the flange feature: the GL uses UNC 4-40 jack-screw hardware on the housing/shell side, while the GX uses the same UNC 4-40 housing shell mount but the two parts are mechanically compatible at the panel cutout and the PCB footprint. For a replacement or panel-swap, the GL drops in without rewiring — the circuit-side footprint is identical. The GV variant adds mounting brackets as a third mechanical option but again carries the same electrical ratings, so any of the three can substitute on the electrical BOM line if the panel hardware choice is compatible.