The 3-487937-4: This is the AMPMODU System 50 housing for a 34-position, dual-row FFC interconnect — the shell that holds the female contacts in place against the mating header. It does not come with contacts; you order those separately as a line item. Pitch is 0.050" (1.27mm) across two rows, which matches the standard AMPMODU System 50 footprint.
Pitch, Positions, and Locking
34 positions on 0.050" (1.27mm) pitch, two rows — the same row-to-row spacing as the rest of the AMPMODU System 50 family. The latch lock is a positive retention feature; without it the FFC can walk out over temperature cycles. Rated 1.5 A per contact at 100 V, with a temperature range from -55°C to 105°C.