That hybrid arrangement means a single connector handles both the logic-level lines and the main DC rail on a board, saving space versus separate signal and power headers. The 0.079" (2.00mm) pitch is tighter than the 0.100" pitch common on older blade power families like PwrBlade®, so the board footprint is more compact, but routing the mixed-width traces between the signal and power blades takes some layout care.
What the 45 VDC Rating Means for the Board
The 45 VDC rating suits low-voltage board-level power distribution.
This receptacle mates with the plug 10159583-C231000LF — same 40-position layout, same 2.00 mm pitch, same 8-row configuration. If the application needs repeated mating, step up to a thicker gold plating grade.