The 5-147383-3: The 1.27mm pitch and 0.5A per contact rating place it squarely in the signal-density class — fine enough for routing traces between pads, but the current ceiling limits it to logic-level and low-power signals, not power rails.
Pitch, stack height, and board footprint
1.27mm mating pitch and 1.27mm row spacing mean the PCB footprint is a 2×15 grid with 0.050-inch centers — the same pattern used across the AMPMODU 50/50 Grid receptacle family. The mated stack height of 9.91mm sets the z-height budget between boards; the 0.367-inch (9.33mm) insulation height of the header itself leaves room for the receptacle's profile. Board locks on the SMT tails provide reflow retention — the connector stays put during solder reflow without secondary fixturing, and the pick-and-place feature allows automated nozzle handling.
Contact finish and cycle life
The post (solder tail) gets 150µin of tin — standard for SMT solderability, but the tin stops at the board interface; the gold on the mating beam is the only part that sees fretting from insertion. Phosphor bronze contact material provides the spring temper needed for consistent normal force over those cycles.
The base part number 147383 covers the unplated variant; this suffix (5-147383-3) specifies the 30µin gold plating and SMT termination in tape-and-reel packaging.