What This Backshell Does for a 50-Pin D-Sub Run
The TE Connectivity 1-5207908-3 is a hinged backshell from the AMPLIMITE HD-20 series, designed to terminate and protect the cable end of a 50-position D-sub connector. It accepts round cable and offers both 90° and 180° cable exit angles, so you can route the harness straight out the back or turn it 90 degrees to lie flat against the panel. The black polypropylene shell includes assembly hardware and a strain relief that clamps the cable jacket, keeping tension off the solder or crimp terminations inside the connector. It ships with the 4-40 mating screws that thread into the D-sub's threaded inserts, so you don't need to source those separately.
Cable Exit Choice: 90° vs 180°
The dual cable exit is the main selection point on this backshell. A 180° exit sends the cable straight out the rear of the D-sub — the simplest path when you have clearance behind the panel. The 90° exit routes the cable perpendicular to the connector axis, which tucks the harness flat against the mounting surface and saves depth inside a shallow enclosure. Both exits are built into the same hinged shell, so you pick the orientation at assembly time without ordering a different part number.
Compatibility and Included Hardware
This backshell fits standard 50-position D-sub connectors and is also listed as compatible with high-density 78-position D-subs that use the same shell size D. The 4-40 mating screws are included in the bag, along with the assembly hardware and strain relief clamp. The shell is unshielded, so it provides mechanical protection and cable management but no EMI gasket — if you need shielding, look at the metal-shell variants in the AMPLIMITE HD-20 family.