Gold vs Tin: Why Plating Matters Here
The gold mating finish (3.90 µinch) on this header contrasts with the tin finish on peer 1379030-3 (12 positions, same pitch) and 4-1775099-7 (20 positions, 4.20 mm pitch). Tin contacts are fine for a single-mate application; gold handles the wear of repeated connect-disconnect cycles in field-service or test equipment without the oxide buildup that tin develops.
