It uses a 0.100" (2.54 mm) pitch on both the pin-to-pin and row spacing, which is the standard grid for legacy and industrial board-to-board interconnects. Tin plating on both the mating surface and the solder tails keeps the cost down for applications where the connector is mated infrequently — the 100.0 µin (2.54 µm) finish on the mating side provides enough thickness for reliable contact in moderate environments without the expense of gold.
The 5 A figure is per-contact, so a fully loaded 44-position connector can carry 5 A on every pin simultaneously only if the total current stays within the temperature rise limits of the housing — in practice, derate when populating adjacent circuits at full load. The 110 V rating provides enough headroom for typical logic-level and low-voltage DC rails.
Through-hole, right-angle termination: the 0.120" (3.05 mm) solder post length is sized for standard PCB thicknesses around 0.062" (1.6 mm). The 0.190" (4.83 mm) insulation height gives clearance for routing traces under the body.