How This Header Compares to Sibling 10129378-936003BLF
The 10129378-936004BLF: Both are 36-position, single-row, unshrouded headers with 0.100" pitch, gold plating, 3A rating, and the same board footprint. The only difference is the overall contact length: 0.508" (12.90mm) for this 004BLF versus 0.538" (13.67mm) for the 003BLF — a 0.030" difference in the pin tail length below the board. If your board thickness or mating receptacle requires a longer post, the 003BLF is the alternative; otherwise, the 004BLF fits the same hole pattern.