Gold Mating Finish for Repeated Mating Cycles
Gold does not oxidise, so contact resistance stays stable across hundreds of mate-unmate cycles — important if this header lives in a test point, a programming jig, or a connector that sees quarterly reconnections in the field.
5 vs 20 Positions — Same Series, Different Row Count
The closest functional sibling in the same BERGSTIK® series is the 77311-102-20LF, which carries 20 positions on a single row with the same 0.100" pitch, same gold mating finish, same 3 A rating, and same through-hole termination. If your BOM calls for 20 circuits, the 20LF is the drop-in; if you need 5, this 05LF is the one.