The 55510-126LF: This is the Minitek® 2.00mm series standard, so the mating header shares the same grid.
In a field-service medical device cycled monthly, that translates to over 40 years of reliable contact at the interface. Phosphor bronze contact material with tin-plated solder tails: the gold mating surface handles repeated insertions while the tin tail wets reliably during reflow.
The 55510-126LF sits between the 24-position 55510-124LF and the 30-position 55510-130LF in the same dual-row SMT family. All share the 2.00 mm pitch, 30.0 µinch gold plating, and 2 A rating — the only variable is circuit count.