The 77315-118-02LF: The 0.100" pitch sets the PCB footprint — each pin lands on a 2.54 mm grid, which is standard for prototyping and many receptacle families. Two positions mean a single signal pair or a low-current power connection; the 3 A per contact rating holds at room ambient, but derate above 25 °C per the housing material curve (thermoplastic, UL94 V-0). The gold-on-mating surface (30 µinch) supports hundreds of mate-unmate cycles without fretting corrosion — useful for test points or modular boards that get swapped.
Right-Angle Mounting and Board Fit
This orientation is typical for mezzanine or edge-card connections where vertical space is tight.