What This Ferrule Does in the HDP-20 System
The TE Connectivity 4-745130-3 is the outer ferrule for the AMPLIMITE HDP-20 D-sub connector family. It is the metal shell that crimps over the cable jacket and the inner ferrule assembly, providing strain relief and shielding continuity for the completed cable assembly. This specific outer ferrule is sized to fit the DB37 through DB50 shell sizes — the larger end of the HDP-20 range — covering 37 to 50 position connectors. In a typical field-terminated D-sub cable, the inner ferrule compresses the braid shield against the cable jacket, then this outer ferrule crimps over the whole assembly to lock the cable to the backshell. The outer ferrule is the part that takes the mechanical strain from cable pull, not the signal contacts.
Position Range and Shell Fit
The 4-745130-3 covers the 37 to 50 position range, which means it fits both the DB37 and DB50 shell sizes in the AMPLIMITE HDP-20 line. If you are building a cable for a DB37 or DB50 connector, this is the outer ferrule to order. The sibling 4-745130-2 covers a different position range — confirm your shell size before committing to the BOM.