The 5-1871056-0 is a 40-position, dual-row header from TE's Dynamic D-1100 series, on 2.00 mm pitch. The 0.490" (12.44 mm) insulation height provides clearance for mating receptacles with integrated latches.
The 0.130" (3.30 mm) row spacing keeps the dual-row footprint compact — about 0.520" wide overall including the shrouding walls. With all 40 positions loaded, the header carries the full signal count for a 40-conductor ribbon cable or a mezzanine board stack.
The base product number 1871056 covers the series family; the full 5-1871056-0 suffix specifies the 40-position, tin-plated, through-hole variant. No official pin-compatible replacement has been announced.