The TE Connectivity AMPLIMITE 5745175-4 is a two-piece shielded backshell for a 50-position D-Sub connector in shell size D. It clamps around a round cable and provides the mechanical transition from the connector's solder-bucket or crimp contacts to the cable jacket, plus a 360° shield termination path. This is the metal version — a zinc alloy casting with nickel over copper plating — so it provides continuous shielding from the connector shell to the cable braid. The nickel finish is the standard choice for industrial EMC environments; it maintains low contact resistance across the shield path and resists corrosion in cabinet air.
Hardware Included — What You Get in the Box
The backshell ships with 4-40 mating screws and the full strain-relief assembly hardware. That means you do not need to order jackscrews or a separate cable clamp as line items — the two-piece shell clamps the cable, the screws fasten the shell halves together, and the 4-40 screws thread into the D-Sub connector's threaded inserts to lock the assembly. For a field-install or repair scenario, having the hardware in the bag saves a sourcing step.
Compatibility Check — Which Connectors It Fits
The backshell is designed for a 50-position D-Sub connector with shell size D. It also fits the high-density 78-position D-Sub, which shares the same shell size D footprint. If you are mating this to a standard-density 50-position D-Sub or an HD-78, the shell profile and screw spacing match. The 180° cable exit and round-cable clamp accept the cable diameter typical of multi-conductor round cables used with those position counts.
Plating and Shielding — Why the Finish Matters
Nickel over copper is the conventional plating for a shielded D-Sub backshell. The copper underplate provides a low-resistance base for the shield connection; the nickel top coat resists oxidation and maintains the contact interface when the backshell is mated to the connector's metallised shell. For applications where conducted EMI or RFI is a concern — industrial drives, test equipment, datacom panels — this backshell completes the shield path from the cable braid to the connector shell, which then ties to the chassis ground through the mounting hardware.
Sourcing is through the independent distribution channel — submit an RFQ for current pricing and availability against your BOM quantity. The closest functional peers in the same AMPLIMITE series are 7-1437064-0 (Tube packaging) and 828277-6 (Bag packaging); the only difference is the shipping package, not the fit or function.