The 966871-1: This is a 20-position, 2-row header from the AMPMODU Mod II series, with a 2.50 mm mating pitch and a 2.54 mm row spacing.
Board lock and tin-plated contacts
The contact length on the mating side is 0.268 in (6.80 mm), and the post length is 0.130 in (3.30 mm) — these dimensions define the board thickness and receptacle engagement window.
Peer comparison: 20 positions vs 6, 4, and 12
Compared to the 953440-3 (6 positions, 2.54 mm pitch, brown housing, friction lock, board-to-cable), the 966871-1 offers 20 circuits at a slightly tighter 2.50 mm pitch and uses a locking ramp instead of a friction lock — the ramp provides a more positive latch under vibration. The 1-1871673-2 (4 positions, 2.50 mm pitch, detent lock, UL94 V-0) shares the same pitch and board-lock feature but has far fewer circuits and uses a detent lock rather than a locking ramp — the 966871-1 is the higher-density option for a multi-signal harness. The 1379030-3 (12 positions, 2.54 mm pitch, brown housing, friction lock, board-to-cable) is a mid-density alternative with a wider pitch and a friction lock — the 966871-1 carries more circuits in the same board footprint area.