Vertical Header with Polarization Peg – What It Is
The 36538-0007 is a Molex vertical pin header, described as MLXHDR VERT POLPEG N/DRN HOLES M. It includes a polarization peg for correct orientation during mating and has no drain holes, which means the housing is solid across the mounting face — no openings for moisture or debris ingress at the board interface.