120-Position MICTOR Plug for Dense Board-to-Board Stacking
The TE Connectivity 1658015-3 is a 120-position plug from the MICTOR series, designed for high-density board-to-board mezzanine connections. With a tight 0.031" (0.80 mm) pitch across two rows, it packs 120 circuits into a compact footprint, making it a fit for backplane or midplane architectures where signal density is at a premium. The plug uses outer shroud contacts with gold plating, rated for reliable signal transmission in controlled environments. Its 11 mm mated stacking height, paired with the 0.404" (10.27 mm) height above board, sets the z-axis gap between parallel PCBs — a dimension you confirm before the board stack-up is locked.
What the 0.80 mm Pitch and Ground Bus Mean for Signal Integrity
The integrated ground bus plane (listed as Ground Bus (Plane) in the features) provides a low-inductance return path directly through the connector body, which is critical for maintaining signal integrity on high-speed differential pairs. Without that plane, you'd see common-mode noise creep in above a few hundred MHz.
Stacking Height and Board Layout Fit
The mated stacking height is 11 mm, with the plug itself standing 0.404" (10.27 mm) above the board surface. The SMT mounting with board guide features helps align the connector during reflow, taking shear stress off the fine-pitch solder joints during thermal cycling. No press-fit or through-hole here — it's a pure surface-mount part, so the board pad pattern and solder paste volume need to be dialed in for the 0.80 mm pitch.
No official second-source cross-reference is on record; the closest parametric peer, the 1-120532-2, runs at a wider 1.00 mm pitch and 6.35 mm stacking height, which changes the board footprint and z-height budget entirely.