Molex 1731110317: Shielded Two-Piece Backshell for DB-25 D-Sub Connectors
The Molex 1731110317 is a two-piece metal backshell from the FMH, FCT 173111 series, designed to fit standard DB-25 D-sub connectors (Shell Size B). It provides a shielded enclosure for the cable-to-connector termination point, combining a zinc die-cast body with nickel plating for corrosion resistance and EMI containment. The 180° cable exit aligns with the cable axis for straightforward inline routing, and the included assembly hardware — M3 mating screws, cable clamp, and strain relief — simplifies installation over a fully populated connector.
Compatibility: DB-25 and High-Density 44-Position
This backshell is compatible with both standard 25-position and high-density 44-position D-sub connectors that share the same Shell Size B mechanical envelope. That means it fits the common 25-position footprint while also accommodating the higher pin-count 44-position variant, giving the buyer flexibility across different cable assemblies without changing the backshell part number.
Shielding and Mechanical Construction
The zinc die-cast body with nickel plating provides a continuous conductive path from the cable braid through the backshell to the D-sub connector shell, effectively terminating the shield. The M3 mating screws secure the two halves together and also serve as the ground bond point. The included cable clamp and strain relief grip the round cable jacket, preventing pull-out forces from reaching the D-sub solder bucket or crimp termination.