The Molex 504622-3010 is a 30-circuit board-to-board plug assembly from the Embedded Stacks series, built on a 0.35 mm pitch. The description '0.35 B/B PLUG ASSY 30CKT EMBSTP' confirms it is the plug half of a mezzanine interconnect — designed to mate with a matching 0.35 mm pitch receptacle to stack two PCBs at a fixed height. The 0.35 mm pitch is tight enough for high-density routing on compact boards, typical in handheld devices, wearables, or small-form-factor modules where every millimetre of board space is allocated.
As a plug assembly, this part mates with a receptacle from the same 0.35 mm pitch Embedded Stacks series — the exact mating order code is not listed here, but the series designation and pitch define the compatible half. Termination is surface-mount (implied by the board-to-board form factor and fine pitch), so the board footprint must match the 0.35 mm pad layout. The plug is shipped in Box packaging, one unit per box, suited for prototype builds or low-volume production where reel feed is not needed.