What This USB Type-A Receptacle Is and Where It Goes
Board Locks and Right-Angle Mounting
Without those locks, the solder joints on the signal pins take all the mechanical strain, and they crack over time — especially in a panel-mount scenario where the USB port is accessed from outside an enclosure.
5000 Mating Cycles — Not Your Average USB Port
A standard USB Type-A receptacle is typically rated for 1500 to 5000 cycles. That matters if this port lives on a piece of equipment where cables are plugged and unplugged daily — think a programming jig, a diagnostic port on a machine, or a public kiosk. If you need even more cycles, the sibling 87520-3S10BPLF is rated for 15000 — but that part comes in Tube packaging, not Tape & Reel.
Unshielded — When That's Fine and When It's Not
This receptacle is unshielded, meaning there's no metal shell around the USB port to shunt EMI to ground. In a metal enclosure where the chassis itself provides the shielding, an unshielded connector is fine — the enclosure handles the EMC. In a plastic-enclosed product or one with long unshielded USB cable runs, you'd want the shielded variant like the 87520-3112ALF instead. The trade-off is cost and footprint: the shielded version has a metal shell that adds a few millimetres to the keep-out zone on the PCB.