The 0.250" (6.35mm) pitch gives each contact room to carry moderate current without crowding the PCB trace — expect a per-contact rating around 5-7 A in still air, though the exact ceiling depends on the wire gauge and ambient temperature.
The 0.250" pitch sets the PCB hole pattern: each pin center is 6.35 mm apart in a single row. This header mates with Universal MATE-N-LOK receptacle housings that accept female socket contacts — the same 0.250" pitch, single-row layout.
