What this 4-position unshrouded header is for
Pitch, positions, and plating — the fit details
The 4 positions are all loaded, so you get the full set of pins. The gold mating surface keeps contact resistance stable over repeated insertions; the tin tails solder reliably to the PCB pad. The insulation height is 0.090" (2.29mm), and the mating pin length is 0.230" (5.84mm) — enough to mate with standard 0.100" pitch receptacles without bottoming out.
