Board Fit and Pinout
The 10129382-912002BLF: This EconoStik header carries 12 positions in two rows on a 0.100" pitch — the same grid as legacy 0.100" IDC ribbon-cable receptacles and many wire-to-board housings. Contact length — 0.230" mating side, 0.090" post — sets the solder tail depth in the plated through-hole. The 0.090" post is short enough that it won't protrude far below the board, helpful in tight clearance builds.
Current, Temperature, and Environment
The 3 A limit is conservative for the 0.100" pitch and gold flash contact finish; derate further if the ambient temperature approaches the 105°C upper bound. Gold flash (1.00 µinch) on the mating surface provides corrosion protection for occasional mating cycles — a few hundred mates over the product life, not thousands. For frequent reconnection, a thicker gold grade would be needed.