What This Header Is and Where It Fits
The Amphenol FCI 68031-109HLF is a single-row, unshrouded header from the BERGSTIK II series. It carries 9 male square pins on the standard 0.100" (2.54 mm) pitch, through-hole solder termination, with a push-pull mating interface. The 30.0 µin gold or Gold GXT plating on the mating surface is a heavy-duty finish for this class — it handles repeated connect-disconnect cycles in prototyping, test fixtures, or field-service without the contact fretting you'd see with tin. The 0.100" insulation height keeps the profile low on the board. Rated 5 A per circuit at 110 V, with a UL94 V-0 black glass-filled nylon housing.
What the Ratings Mean for the Fit
The 0.100" pitch is breadboard-compatible — the footprint is a standard 0.100" square grid, so board layout is straightforward. The 5 A per circuit rating is typical for a signal header at this density; the real current limit in a dense board is the temperature rise through the single row of pins, not the contact itself. The 30.0 µin gold plating is the key spec for durability: it's rated for hundreds of mating cycles, which matters if this header lives on a programming or test jig. The unshrouded design means no keying or polarization — the mating receptacle's friction fit provides all the retention, so it's best suited for low-vibration internal board-to-board connections where the cable isn't tugged.