The Molex 0511102650 is a 26-circuit receptacle housing from the Milli-Grid 51110 series — a 2.00 mm pitch, 2-row system designed for dense wire-to-board and wire-to-wire interconnects where board space is tight.
Contacts are not included. The housing ships empty — you must order the Milli-Grid crimp socket terminals separately. The black glass-filled polyester body (UL94 V-0 rated) takes the crimp terminals and locks them in with a positive retention latch built into the cavity.
Pitch and Layout — What the 2.00 mm Grid Means for Your Harness
Both the pitch between contacts and the row spacing are 0.079" (2.00 mm). That gives a square grid — the 26 positions are arranged as 13 per row, and the cavity layout is symmetric in both axes. For the harness builder, this means the wire exit spacing is uniform; for the board layout engineer, the footprint on the mating header is a regular 2.00 mm × 2.00 mm pattern. The 2-row format keeps the connector width manageable — roughly 26 mm across the body — compared to a single-row 26-position part that would run nearly twice as long.