With 26 positions loaded, the connector spans roughly 20 mm across the rows — the layout engineer needs that dimension to clear nearby components and route the inner-row traces out between the outer-row pads.
For a connector that stays mated for years in a clean indoor environment, tin contacts are cost-effective and reliable. The UL94 V-0 glass-filled nylon housing holds up to 105°C ambient, so the real current ceiling depends on the wire size crimped into the mating terminal and the number of adjacent circuits carrying full load.