The TE Connectivity AMPLIMITE.050 III 5749889-3 is a two-piece shielded backshell for D-subminiature connectors. It fits the D shell size, accommodating both standard 50-position and high-density 78-position D-subs. The 180° cable exit routes the cable straight out the back — a clean inline path for panel-mount or cable-assembly applications where a right-angle exit would clash with the enclosure wall. The shell is zinc with nickel over copper plating, giving a continuous conductive surface for EMI shielding. The spring lock holds the two halves together without loose screws, and the assembly hardware and strain relief are included in the bag — no extra parts to source for a standard install.
Shielding and Grounding — Why the Plating Matters
Nickel over copper on a zinc shell provides a low-resistance path from the cable braid to the D-sub shell. The nickel finish also resists corrosion in industrial cabinet environments where humidity cycles are routine.
What's in the Bag
The backshell ships as a bagged kit: two shell halves, the spring lock, and the assembly hardware for the strain relief. No separate order for jack-screws or a cable clamp — the hardware is part of the base product number 5749889. The spring lock eliminates the need for a separate latch or screw to keep the halves closed during cable assembly.