The 2355172-3: The 0.157" (4.00 mm) mating contact length engages with a standard AMPMODU socket, and the 0.110" (2.79 mm) solder post sits through a 1.6 mm PCB without protruding past the bottom side.
Comparing the 3-Position 2.00 mm to a 3-Position 2.54 mm Sibling
The closest functional peer, 1376779-2, is also a 3-position single-row header but on a 2.54 mm pitch with 8.00 µin gold on the mating contact — double the gold thickness of the 2355172-3. The 1376779-2 carries 3 A per contact and is rated 250 VAC vs 125 VAC/DC for the 2355172-3. If your board stack-up has the space for 2.54 mm pitch and you need higher current or voltage margin, the 1376779-2 is the better fit. The 2355172-3 saves board real estate with its tighter 2.00 mm pitch and still meets signal-level requirements.
It is ROHS3 compliant. No official second-source exists, but the 1376779-2 is a functional alternative if the pitch and rating differences are acceptable.