1.27 mm pitch, 12 positions, 1.2 A
The 0903257012 is the 12-position member of Molex's Picoflex PF-50 90325 header line, a single-row board-to-wire connector on 1.27 mm pitch. It is rated 1.2 A per contact at 250 V with palladium-nickel mating surfaces, through-hole solder termination, and a shrouded 2-wall housing with board lock.
Board lock and shrouded housing
The push-pull fastening and 2-wall shroud protect the male blade contacts during mating; the board lock holds the header in place during wave solder.