Board Fit and Pitch Budget
This saves z-height but trades away polarisation; a reversed mate is possible if the receptacle isn't keyed.
Current and Contact Surface
ROHS3 compliant per — no restricted substances in the housing or plating.
Peer Comparison: 1376779-2
The key difference is the mating gold thickness — 1376779-2 carries 0.203 µm (8.00 µinch) gold vs the 0.100 µm (3.94 µinch) on 2355172-5. The thicker gold on 1376779-2 supports higher mating cycle counts; for a low-cycle application the thinner gold on 2355172-5 is sufficient and typically costs less.