The 3-1734506-8: This is a board-to-board receptacle from the AMPMODU series, 30 positions loaded in two rows with a 0.079" (2.00 mm) pitch.
Gold mating finish for signal reliability
The mating contacts are gold-plated at 10.0 µin (0.25 µm) over phosphor bronze, with tin-plated posts at 80.0 µin (2.03 µm).
The UL94 V-0 thermoplastic insulation handles the thermal envelope without issue. For current, the limiting factor is the contact density and pitch — derate per the series guidelines if running near the thermal ceiling.