36 circuits, 1.25mm pitch, dual-row — board fit
The 5054333621: This is a 36-position, dual-row header on 0.049" (1.25mm) pitch — the tight pitch drives the PCB footprint and limits per-contact current; the actual current ceiling depends on the wire gauge used in the mating half.
Gold plating — mating cycle and corrosion budget
Both the mating contact and the solder post carry 15.0µin gold over nickel.
Shrouded, latch holder, solder retention — vibration and assembly
The 4-wall shrouded housing with latch holder provides keyed mating and positive locking — the latch resists back-out under vibration.
Automotive, industrial, general-purpose — application scope
The 50VAC/DC voltage rating suits low-voltage signal and power distribution in these environments.