The 0877591850: Molex Milli-Grid 87759 series header, 18 positions, dual rows spaced 2.00 mm apart. Unshrouded push-pull fastening means the header sits low on the board — the insulation height measures 0.059" (1.50 mm) — but the mating receptacle must align to the pins without a shroud guide. Gold mating finish at 15.0 µinch (0.38 µm) over phosphor bronze contacts supports repeated mating cycles in field-service or test-fixture use. Tin-plated solder tails keep the board-side cost in check.
Surface-mount termination and board guide
SMT termination with a board guide feature — the header self-aligns during reflow, reducing tombstoning risk on the dual-row footprint.
Peer comparison — 38- vs 18-position variant
If the BOM calls for 18 positions, 0877591850 is the correct fit; the 38-position version occupies roughly twice the board-edge length.