The 5-104362-9: All 10 positions are loaded, so you get the full circuit count without needing to populate extra pins.
Current, voltage, and contact finish — signal-grade duty
The 3 A ceiling is typical for logic, sensor, and low-current telecom circuits. The mating interface is gold-plated to 15 µinch (0.38 µm) over brass pins. That thickness supports a few hundred mating cycles in clean environments without corrosion issues — fine for field-serviceable equipment but not for high-cycle robotic connections.
Temperature range and flammability — where it can live
RoHS compliant per TE Connectivity's current compliance declaration.