USB 2.0 Micro B Receptacle for SMT Assembly
The Molex 1051330011 is a USB 2.0 micro B receptacle, the 5-contact surface-mount variant in the 105133 series. It is a shielded, vertical-mount design with gold-plated contacts rated for 10000 mating cycles — well above the typical micro USB connector, which means it is built for applications where the port sees frequent connect/disconnect duty over the product life, such as handheld instruments, data loggers, or portable medical devices. The 1A and 1.8A current ratings reflect the standard micro B allocation: 1.8 A on the VBUS pin for charging, 1 A on the signal contacts for data and ID detection.
What the 10000 Mating Cycles Mean on a Micro USB
The gold contact finish supports this — gold does not oxidise or corrode over repeated insertions the way tin does, so the contact resistance stays stable across the rated life. For a device that gets plugged in several times a day for years, this connector will not wear out before the rest of the product does. The shielded steel/stainless shell also contributes to mechanical robustness, protecting the plastic housing from cracking under off-angle insertion forces.
SMT Assembly and Board Layout
The vertical orientation means the USB plug inserts perpendicular to the PCB — typical for edge-mounted or panel-mounted ports.