The TE Connectivity 5749621-5 is a 50-position D-sub plug from the AMPLIMITE.050 III series, designed for IDC termination to ribbon cable. It carries male pins on a 0.050-inch pitch with 0.100-inch row spacing — the standard.050 III layout for high-density signal interconnects. The 50-position count and 2-row density make this plug a fit for parallel data buses, industrial I/O, or any application where a shielded ribbon cable needs a reliable D-sub interface.
Shielding and Termination — What the Specs Mean
The shielded steel shell with tin-nickel plating is the key differentiator here. It bleeds EMI from the cable braid to the chassis ground before the signal reaches the pin field — critical for data lines running near motors, VFDs, or switch-mode supplies. The IDC termination means the ribbon cable is pressed onto the insulation-displacement contacts in one operation; no stripping, no soldering. This gives a consistent gas-tight connection across all 50 positions, but the cable must be the correct gauge and pitch for the IDC slot geometry — verify the ribbon cable spec against the connector's wire range before building the harness. In a field-service environment where the connector is unmated and re-mated during troubleshooting, the gold finish prevents fretting and signal dropout.