The TE Connectivity 5749199-1 is a two-piece shielded backshell from the AMPLIMITE.050 III series, designed to terminate and shield a 20-position D-subminiature connector. The 75° cable exit routes the round cable bundle at an angle off the connector axis, which helps manage bend radius in shallow enclosures or where the harness must turn immediately behind the panel. The metal zinc alloy shell is plated nickel over copper for consistent EMI/RFI shielding continuity across the mated interface.
Hardware and Retention
Assembly hardware and a strain relief are included with the backshell, so the kit covers the mechanical termination without sourcing separate jack-screws or cable clamps. The spring lock feature holds the two backshell halves together during assembly and disassembly — no tools needed to open or close the shell, which saves time during rework or field service. The strain relief clamps onto the round cable jacket to transfer pull loads away from the solder or crimp terminations inside the connector.
Shielding and Plating
The nickel over copper plating on the zinc shell provides a low-resistance path for shield currents. This matters in industrial or telecom environments where cable radiation or external RF fields could couple into the data lines. The silver colour is the natural finish of the nickel plating.
Compatibility and Mating
This backshell fits standard 20-position D-subminiature connectors with the.050-inch (1.27 mm) contact spacing that defines the AMPLIMITE.050 III series. The 75° exit works with round cable diameters that fit within the strain relief range — the exact cable diameter limits are in the product drawing. The spring lock and assembly hardware are sized for the 20-position shell footprint; the same backshell will not fit a 15- or 25-position D-sub without a shell size mismatch.