5120531-1 is a 1.0mm Free Height (IEEE 1386) SMT stacking receptacle connector designed for parallel board-to-board applications. This 64-position receptacle features 30µ" gold plating with a pickup cap for automated placement, and a height (H) of 10.37mm [.408]. The connector offers a current rating of 1.0 ampere per contact, contact resistance of 30 milliohms maximum (initial), and durability tested to 100 mating cycles minimum. With improved locating posts for fast, accurate hand placement and additional clearance during mating for increased reliability, this connector is ideal for mezzanine card applications requiring precise board-to-board interconnection.