0.35 mm Pitch, 12-Position Mezzanine Plug for 0.6 mm Stack
The Molex 5050701240 is a 12-position plug from the SlimStack 505070 series, designed for board-to-board mezzanine stacking at a mated height of 0.6 mm. The 0.014" (0.35 mm) pitch and dual-row layout pack the 12 circuits into a narrow footprint suited for compact handheld or portable electronics where PCB real estate is tight. Outer shroud contacts on the plug side protect the mating interface during alignment and reduce the risk of bent pins during assembly. Gold contact finish at 4.00 µ" (0.100 µm) provides a corrosion-resistant mating surface for the moderate cycle life typical of internal board-stacking applications — the connector is mated once during final assembly and rarely disconnected in the field. The 0.019" (0.48 mm) height above board keeps the component profile low, which matters when the top PCB sits close to a display or battery pack.
Surface-mount termination eliminates through-hole vias, freeing routing channels on inner PCB layers for signal traces. The pick-and-place feature allows the connector to be handled by standard vacuum nozzles on an SMT line, and the solder retention pads anchor the part to the board during reflow and against shear loads from the mating receptacle. The 0.35 mm pitch demands careful PCB footprint design — trace escape between pads typically requires a via-in-pad or microvia strategy on inner layers. The 2-row arrangement gives 6 contacts per row, which keeps the overall connector length short enough to fit within a narrow board edge.
Comparison: 5050701240 vs 5050701220
The 5050701220 is the 10-position sibling in the same SlimStack 505070 series, sharing the identical 0.014" (0.35 mm) pitch, 2-row layout, 0.6 mm mated stacking height, and gold contact finish.