It is a board-to-board interconnect, through-hole soldered, with a standard 0.100-inch (2.54mm) pitch on both rows and a 0.100-inch row spacing. The 66 positions are fully loaded — 2 rows of 33 — which makes this a dense signal interconnect for parallel board stacking or cable-to-board applications using a matching receptacle.
The 5 A rating is typical for a signal-grade header — adequate for logic-level power, I/O, and low-current distribution, but not for bus-level or motor-drive circuits. The push-pull fastening type is the default for unshrouded headers; no locking ramp is present.
The contact length — 0.320-inch (8.13mm) mating section and 0.110-inch (2.79mm) solder tail — gives a total through-hole depth of 0.530-inch (13.46mm). The tail length is short, suited for standard 1.6mm PCBs; confirm the board thickness and plated-through-hole depth before layout.