The 2842112-4: The solder tails are tin-plated (78.7 µinch / 2.00 µm) for reliable solder-joint wetting during wave or hand-solder assembly.
ROHS3 compliant per the manufacturer listing, and the housing material is rated UL94 V-0.
Compared to the 1-1871673-2 (2.50 mm pitch, shrouded, dual-row, tin mating finish), the 2842112-4 offers a finer pitch and gold mating surface but lacks the board lock and detent lock features — choose the 1-1871673-2 for higher vibration environments or when a shrouded housing is needed. The 1394090-1 is a 6-position, 2.85 mm pitch, single-row shrouded header with a latch holder — it carries more positions and a latch but uses tin plating on the mating interface, which limits mating cycle life compared to the gold on the 2842112-4. The 1376779-2 is a through-hole header with 3 A current rating and 8.00 µinch gold mating finish — it carries a higher current ceiling but thinner gold, so the 2842112-4 is the better choice for applications requiring more mating cycles.