What this Power Key header is
Pitch, positions, and voltage — the BOM-fit facts
Rated at 300 VAC, this header suits line-voltage power distribution inside an enclosure — the UL94 V-0 glass-filled nylon 6/6 housing handles the flame-rating requirement for equipment inside a cabinet. The 19.4 mm mated stack height gives enough clearance for cable strain relief or board-to-board spacing in a power distribution block.
Sourced per RFQ against your target quantity; confirm the mating half (a Power Key crimp receptacle) and the wire gauge range before committing the line.