Pitch and circuit count define the board fit
The 640454-9: The single-wall shroud polarizes the mate and protects the square male pins from bending during handling. Rated 250VAC and current varies by wire gauge — the limiting factor is the terminal and wire, not the header pin itself. Tin-on-tin contact interface suits moderate-cycle, general-purpose applications where cost per position matters more than high-cycle durability.
Mating half and wire termination
The 0.295" (7.49mm) mating pin length provides sufficient wipe for reliable contact with IDC or crimp receptacles.