The Molex 0464369203 is a 3-position receptacle from the EXTreme Ten60Power 46436 series, designed to carry 60 A per contact in a single row of power blades. That rating puts each contact at bus-level current — think the main DC rail in a server PSU or a battery interconnect, not a signal line. The 5.50 mm pitch is wide enough to support the 600 VAC / 250 VDC voltage rating with adequate creepage between adjacent blades, so you don't get tracking across the housing surface under high-voltage conditions.
Press-fit and right-angle — the mechanical fit for a backplane
Press-fit termination means the contact is pressed into a plated through-hole without solder — a clean, rework-friendly assembly for backplane power distribution where you want to avoid the thermal stress of wave soldering.