It uses the industry-standard 0.100" (2.54 mm) pitch on both the pin spacing and the row spacing, so it drops onto a standard 0.100" grid footprint without a board respin.
The 5 A figure is per-contact at the rated temperature rise.
This header mates with any standard 0.100" pitch, 12-position, dual-row receptacle housing that accepts 0.025" square pins — the BergStik II series itself offers matching receptacles, and the 0.100" grid is common across many manufacturers. The through-hole solder termination requires the PCB to have plated through-holes at the 0.100" grid positions; the post length of 0.110" (2.79 mm) is sized for standard 1.6 mm thick boards.