The Molex 0747540021 is a light pipe set from Series 74754, designed as an accessory for SFP+ cage assemblies. It provides a visual link for port status indicators, routing light from the PCB-mounted LED to the panel face. This is not a connector — it is a mechanical light guide that snaps into the cage or bezel, typically used in networking equipment, switches, and transceiver modules where SFP+ ports need clear link/activity indication.
Packaged in Bulk, the 0747540021 is supplied loose for manual or automated assembly into the SFP+ cage assembly. The base product number 074754 covers the light pipe family; this variant is the specific configuration for the intended cage design.