Each contact carries 5 A at 110 V, and the 0.100" (2.54 mm) pitch on both rows and between rows gives you a standard footprint that matches common perf-board and prototyping grids.
The 0.100" (2.54 mm) insulation height keeps the mated pair low-profile, and the UL94 V-0 rated black housing meets the flammability requirement for equipment inside an enclosure.
