The 1.8 A per contact rating covers the USB 2.0 power bus, and the 100 VAC rating is well above the 5 V bus voltage, giving headroom for any inrush or fault condition.
Mating Cycle Endurance and Solder Retention
This makes it a fit for products that see frequent cable swaps: field-programmable instruments, test fixtures, or handheld terminals where the port is used daily over years. The solder retention features add mechanical anchoring to the SMT pads, reducing the risk of lifted pads or cracked joints from cable strain.
The shielded shell — steel with a stainless outer layer — provides the EMI containment needed for USB 2.0's 480 Mbps differential pair. The gold contacts on the mating interface maintain consistent contact resistance through the rated cycle life. The 1.8 A per contact is the per-pin limit; the total port current is the sum of the VBUS and GND pins, so the connector itself can handle the 1.5 A USB 2.0 charging spec without issue.